| IE Root | Meaning of IE Root | Irish Word(s) |
| ad- | to, near, at | tá |
| agwh-no- | lamb | uan |
| al- | beyond | eile |
| angh- | tight, painful | cúng |
| āno- | ring | fáinne |
| ant- | front, forehead | éadan, buntáiste |
| ap- | to take, reach | cúpla |
| arə- | to fit together | ríomh |
| arg- | to shine; white; silver | airgead |
| aus- | to shine | ór |
| awi- | bird | ubh |
| bak- | staff | bac |
| band- | drop | bainne |
| belo- | shining, white | Bealtaine |
| beu- | to swell | buidéal, póca, púca |
| bhar- | point, bristle | barr |
| bhau- | to strike | bodhar, botún |
| bheng- | to break | bocht |
| bhei- | bee | beach |
| bhei- | to strike | bain, béim |
| bhel- | to swell | ball, eireaball |
| bherdh- | to cut | bord |
| bheudh- | to be aware, make aware | rabhadh |
| bheug- | to bend, be pliable | bog |
| bhrāter- | brother | deartháir |
| bhreg- | to break | broim |
| bhrēi- | to cut, break | briathar, bris |
| bhreus- | to break | bruscar |
| bhugo- | stag, ram, he-goat | poc, boc |
| dā- | to divide | deamhan |
| dakru- | teardrop | deoir |
| dap- | to apportion in exchange | damáiste |
| deik- | to show, pronounce solemnly | mallacht |
| deiw- | to shine | dia |
| dekm | ten | déag |
| deks- | right, south | deas |
| del- | long | long |
| deru- | to be firm, solid | draoi, dearbh |
| deyə- | to whirl around | dian |
| dhal- | to bloom, turn green | duilleog |
| dhē- | to put | creid |
| dheigh- | to form, build | fíor |
| dhen- | to flow | foinse |
| dher- | to make muddy, darkness | dearg |
| dheu- | to rise in a cloud, as dust | dall |
| dheub- | deep, hollow | domhan |
| dhghem- | earth | duine |
| dhreu- | to fall, drip, droop | drúcht |
| dhubh- | to smoke; hazy | dubh |
| dhūno- | fortified place | dún |
| dhwer- | door | doras |
| dṇghū- | tongue | teanga |
| dō- | to give | dán |
| ebōl- | apple | úll |
| eghs | out | ach |
| eghs- | out | múisiam |
| ei- | to go | bóthar, contae |
| eis- | passion | iarann |
| ekwo- | horse | each |
| el- | elbow, forearm | uillinn |
| em- | to take, distribute | sampla |
| en | in | iníon, intinn, inis |
| enter | between | idir |
| erəd- | high | ard |
| eti | above, beyond | athbhliain |
| eu- | empty | fásach |
| geu-lo- | glowing coal | gual |
| gal- | to be able, have power | gallúnach |
| gar- | to call, cry | gáire |
| gebh- | jaw, mouth | gob |
| gen- | to compress into a ball | cnaipe |
| gen- | to give birth | Nollaig, iníon |
| ghabh- | to give, receive | gabh |
| ghaiso- | stick, spear | ga, gaisce |
| ghel- | to shine, be bright | geal, glas |
| ghengh- | to go, walk | céim |
| gher- | to grasp, enclose | gort, garraí |
| gher- | to shine, glow | grian |
| ghers- | to bristle | garbh |
| gheuə- | to call, invoke | guth |
| ghos-ti- | stranger, guest, host | ósta |
| ghredh- | to walk, go | grá |
| gnō- | to know | gnáth, ionadh |
| gwei- | to live | beo, bia |
| gwelə- | to throw, reach | barúil |
| gwen- | woman | bean |
| gwerə- | heavy | brí |
| gwerə- | to praise aloud, declare | brách |
| gwhedh- | to ask, pray | guigh |
| gwou- | ox, bull, cow | bó, buachaill, bóthar |
| isəro- | powerful, holy | iarann |
| kā- | to like, desire | cara |
| kaiko- | one-eyed | caoch |
| kakka- | to defecate | cac |
| kamer- | to bend; vault | seomra |
| kan- | to sing | ceol |
| kan- | to sing | caint |
| kap- | to grasp | seabhac, cuan |
| kapro- | billy goat | gabhar |
| kar- | hard | carraig |
| kat- | to fight | cath, cogadh |
| kaul- | stalk, stem | cál |
| kel- | to cover, conceal | ceil |
| kel- | to prick | colg |
| kel- | to shout | coileach |
| kel- | to strike, hack | claíomh, clár |
| ken- | empty | gan |
| ken- | fresh, young | céad |
| kenk- | to bind, gird | ceangal |
| kens- | to speak solemnly, proclaim | cíos |
| kerd- | craft | ceird |
| kerd- | heart | croí, creid |
| kerk- | chicken | cearc |
| kers- | to run | carr |
| kistā | basket | ciste |
| klāro- | piece of wood | clár |
| kleg- | to cry, sound | clog |
| klei- | to lean | claon, clé |
| kleu- | to hear | cluas, cluin, clú |
| knu- | nut | cnó |
| kom | near, by, with | cúng, cogadh, déag, cuimhne, cosúil, cuma, contae, cúpla, coisc |
| konəmo- | bone | cnámh |
| korkā- | gravel | siúcra |
| krei- | to sieve, discriminate | ceart |
| kreuə- | raw flesh | crua |
| krso- | wagon | carr |
| kwat- | to ferment, be sour | cáis |
| kwe | and | déag |
| kwei- | to observe, attend to, honour | ciall |
| kwel- | to revolve, move around | buachaill |
| kwer- | shaped like a shell or dish | coire |
| kwon- | dog | cú |
| laku- | lake, pool | loch |
| lau- | to gain, profit | leor, luach |
| legh- | to lie, lay | luigh, folach |
| legwh- | light in weight | laghad, léim |
| lei- | to flow | lear |
| lendh- | open land | lann |
| leug- | to break | lucht |
| leup | to peel, break off | luibh, lom, leabhar |
| līno- | flax | líon |
| mā- | good | maith, maidin |
| maghu- | young person | mac, maighdean |
| mai- | to cut | maol |
| marko- | horse | marcaíocht |
| māter- | mother | máthair |
| mē- | big | mór, méid |
| mē- | to measure | mí |
| med- | to measure, take proper measures | meas, meáchan |
| meg- | great | amach, amuigh, maor |
| mei-no- | opinion, intention | mian |
| meik- | to mix | meisce |
| mel- | bad | mallacht |
| mel- | to grind, crush | meil |
| melit- | honey | milis |
| mēms- | flesh, meat | mír |
| men- | to think | múin, cuimhne, dearmad |
| menegh- | copious | minic |
| mēns | moon, month | mí |
| mer- | to die | marbh |
| merk- | to decay | meirg, bréan |
| meu- | damp, wet | mún |
| meuə- | to push away | múisiam |
| molko- | skin bag | mála |
| mori- | body of water | muir |
| ndher- | under | ifreann |
| ne | not | ionadh |
| nebh- | cloud | néal |
| ned- | to tie, bind | snaidhm |
| nei- | to be excited, shine | naomh |
| neigw- | to wash | nigh |
| nek- | death | éag |
| nek- | to reach, attain | agus |
| nem- | to assign, allot | uimhir |
| ner- | man, vital force | neart |
| nētr- | snake | nathair |
| newo- | new | nua |
| nizdo- | bird's nest | nead |
| no-men-, ənoə-mn- | name | ainm |
| nogw- | naked | nocht |
| oi-no- | one | aon |
| okw- | to see | fuinneog |
| ol- | beyond | oll |
| ongw- | to salve, anoint | im |
| op- | to work | obair |
| or- | large bird | iolar |
| ors- | buttocks | eireaball |
| ost- | bone | fadhb |
| oug- | cold | fuar |
| ōwyo- | egg | ubh |
| pəter- | father | athair, paidir |
| pā- | to feed | pór |
| pak- | to fasten | póg |
| pau- | little, few | páiste |
| ped- | foot; to stumble | peaca |
| peisk- | fish | iasc |
| pel- | hide, skin | cailleach |
| pelə- | flat; to spread | lár |
| pelə- | to fill | lán |
| per | before | rabhadh, riamh, barúil, dearmad |
| per- | to sell, grant | rath |
| pet- | to rush, fly | peann, éan |
| peuə- | to purify, cleanse | úr |
| plab- | to flap | labhair |
| plat- | to spread | clann, leathan |
| pleu- | to flow | luath |
| pleus- | to pluck; feather, fleece | clúmh |
| pōi- | to drink | beoir |
| polo- | swollen, thick | oll |
| poti- | powerful, lord | ósta |
| pu- | to swell, blow | gallúnach |
| reg- | to move in a straight line, lead | rí, riail |
| ret- | to run, roll | rith, roth |
| reudh- | red, ruddy | rua |
| rūno- | mystery, secret | rún |
| sā- | to satisfy | sáith |
| sak- | to sanctify | sagart |
| sal- | dirty grey | salach |
| sal- | salt | salann |
| sāwel- | sun | súil |
| sē- | long, late | síor |
| sē- | to sow | saol, síol |
| sed- | to sit | nead, tánaiste |
| segh- | to hold | scoil |
| sekw- | to say | coisc, scéal |
| sel- | of good mood | slán |
| sel- | take, grasp | seilbh |
| sem- | as one | cosúil, cuma |
| sem- | summer | samhradh |
| sen- | old | sean |
| seuə- | to take liquid | sú |
| skamb- | to curve, bend | cam |
| skei- | to cut, split, separate | scian, sciath, gaisce |
| sker- | to cut | scar, scrios |
| skop- | to cut with a blade | scuab |
| skrībh- | to cut, separate | scríobh |
| slēg- | to be slack, languid | lag |
| slei- | slimy | slí, sleamhain |
| sleug- | to swallow | slog |
| sloug- | to help, serve | slua, teaghlach |
| snā- | to swim | snámh |
| sneigwh- | to snow | sneachta |
| spen- | to draw, stretch | spéis |
| spend- | to bind oneself by a ritual act | pós |
| sreu- | to flow | sruth |
| stā- | to stand | faoiseamh, tá, inis |
| steg- | to cover | teach, isteach, istigh, teaghlach |
| steig- | to stick; pointed | tiarna |
| steigh- | to stride, step | staighre |
| ster- | to spread | sráid |
| swen- | to sound | seinn |
| swep- | to sleep | suan |
| swergh- | to worry, be sick | searg |
| swesōr | sister | deirfiúr |
| tauro- | bull | tarbh |
| tegu- | thick | tiubh |
| telə- | to lift, support | talamh |
| ten- | to stretch | tanaí, intinn |
| tep- | to be warm | tine, Bealtaine, te |
| ter- | peg, post, marker | tearmann |
| terə- | to rub, turn | trua |
| ters- | to dry | tír, tart, trosc |
| teu- | to swell | tóin |
| teutā- | tribe | tuath |
| tragh- | to draw, drag, move | trácht, trá |
| trei- | three | trí |
| treud- | to press, squeeze | trom |
| uper | over | ar |
| upo | under; up from under; over | uasal, uachtar, faoi, folach |
| wal- | to be strong | flaitheas |
| walso- | post | balla |
| wātu- | inspired utterance | fáth |
| wē- | to blow | fuinneog, fead |
| wed- | wet; water | uisce |
| weg- | to be strong, lively | féile |
| weg- | to weave | figh |
| wei- | to turn, twist | fiar |
| weid- | to see | draoi, fionn, fios, taoiseach, fís, stair |
| weik- | to fight, conquer | fíoch |
| weip- | to turn, vacillate, tremble | feamainn |
| wekw- | to speak | focal, uacht |
| wel- | to see | file |
| wel- | to turn, roll | fill |
| welə- | wool | olann |
| wer- | to turn, bend | gorm, fraoch |
| wēro- | true | fíor |
| wesr | springtime | earrach |
| wēsu- | good | fiú |
| wet- | to blow, inspire | fáth |
| wī-ro- | man | fear |
| widhu- | tree | fia |
| wīkmtī | twenty | fiche |
| wleik- | to flow | fliuch |
| wlik-u- | wet | fliuch |
| wreik- | to turn | fraoch |
| wrmi- | worm | gorm |
| yēr- | year, season | uair |
| yes- | to boil, foam, bubble | eas |
| yeu- | vital force, youthful vigor | óg |