n. a cave; a den

Ogotog, a. full of caves

Ongl, n. a corner, an angle

Ongli, v. to make angular

Ongliad, n. forming angles

Onglog, a. having angles

Ohonof, a pronominal preposition, from me, of me, out of me

Oi, v. to proceed; to come forward: interj. well, very well

Oiad, n. an attending; a waiting; a listening

Oian, n. a listening; a waiting

Oianu, v. to listen; to wait

Ol, n. mark, trace; track: a. hindmost. Olaf, last

Olafiad, n. a successor

Olafiaeth, n. a successorship

Olbrain, n. the herb crowfoot

Ole, n. a ravine

Olew, oil, unction

Olewwydd, n. olive trees

Oliedydd, n. a pricker, in hunting

Olion, n. leavings, refuse

Olp, n. puncture; islet-hole

Olrhain, n. a search after

Olrhead, n. a beagle

Olrheiniad, n. a tracing out

Olrheiniadwy, a. scrutable

Olrheinio, v. to scrutinise

Olrheiniwr, n. a tracer, a scrutiniser

Olwyn, n. a wheel, a trundle

Olwynad, n. a wheeling

Olwyno, v. to wheel

Olwynog, a. having wheels

Olynol, a following

Olysgrif, n. a postscript

Oll, a. all, whole, everyone

Ollalluog, a. almighty, omnipotent

Ollalluogrwydd, n. almightiness

Ollddifaol, a. all-consuming

Ollddigonol, a. all-sufficient

Ollddoeth, a. all-wise, all-knowing

Ollgyfoethog, a. all-powerful

Olliach, n. the herb all-heal

Ollnerthedd, n. omnipotency

Ollnerthog, a. omnipotent

Ollryw, a. omnigenous

Ollwybodol, a. omniscient

Om, n. what stretches round

On, n. what is superior; what is in continuity; an ash

Onc, n. what is headlong

Onco, pron. that, that there

Ond, conj. but, only; prep. except. but

Onen, n. an ash, an ash tree

Oni, Onid, adv. not ? conj. if not, unless; except, until

Onide, conj. otherwise, or else adv. if not so; is it not so?

Onis, conj. if not, unless, except: adv. not?

Onwydd, n. ash trees

Or, n. a limit; margin, brim: conj. if

Orch, n. a limit; rim

Oriad, n. a puffing, a panting

Oriadur, n. a time-piece, watch

Oriain, v. to puff, to pant: n. utterance; panting

Oriog, a. having fits, fickle

Oriol, a. belonging to the hour

Oriawr, n. time-piece, watch

Oriel, n. a porch, gallery

Orig, n. a little while; adv. now, at present

Origyn, n. a short space

Orlais, n. a time-piece, clock

Orn, n. a start; push; threat

Ornedigaeth, n. a threatening

Ornedd, n. a threatening state

Ornest, n. tilting, combat, duel

Ornestfa, n. place of combat

Ornestiad