Ab, (or Ap,) the son of.

Aber, the junction of a river with the sea.

Allt, a hill; a mutation of gallt.

Annedd, a dwelling place.

Am, about.

Ar, upon. Arvon, bordering upon MÔn, or Anglesey.

Ardal, a region.

Argae, an embankment.

Avon, a river.

BÂch, little; when joined to a substantive feminine, it is written vÂch.

Bala, an outlet.

Ban, high, lofty. Plur. banau, heights, or eminences.

Banc, a bank.

BÂs, shallow.

Bedd, a grave.

Blaen, a point, upper end, or extremity.

BÔd, an abode, residence, habitation.

BÔn, the base.

Braenar, fallow land.

Braich, an arm.

BrÎg, top, summit.

BrÎth, speckled, mottled.

Bron, a breast, the slope of a hill.

Bryn, a hill, or mount. Pl. bryniau.

Buwch, a cow.

Bwlch, a pass, or defile. Pl. bylchau.

CÂd, battle, war.

Cader, a chair.

Cae, a field. Pl. caeau.

Caer, a fortress, or fortified town.

Cantrev, a district containing 100 townships. A canton, a hundred.

Capel, a chapel.

Careg, a stone. Pl. ceryg.

Carn, a heap of stones. The hoof of a horse.

Carnedd, a heap of stones. Pl. carneddau.

Castell, a castle. Pl. cestyll.

Ceulan, bank of a river.

Cevn, the bank, ridge of a hill.

CÎl, a recess. Cilvach, a small recess.

Clawdd, a hedge, dyke. Clawdd Offa, Offa’s dyke.

Clogwyn, a precipice.

CÔch, red.

Coed, trees. Sing. coeden, a tree.

CÔr, a circle, a choir. Bangor, high choir.

Corlan, a sheepfold.

Cors, a bog, or fen.

Craig, a rock, a crag. Pl. creigiau.

Croes, a cross.

Crug, a hillock. Pl. crugion.

Cwm, a valley, dingle, glen.

Cymmer, the junction of two rivers.

Dau, two.

Dehau, south, the right side.

Din, dinas, a city, a fort, a fortified place on a hill.

DÔl, a meadow.

Drws, a doorway.

Du, black; hence dwrdu, the river Dee; literally, Black-water.

Dwy, two. (fem.)

Dwr, or dwvr, water. Pl. dyvroedd.

Eglwys, a church.

Erw, an acre.

Esgair, a leg, a long ridge of mountain.

Fordd, a road.

Fynnon, a fountain, a well.

Gaer, a mutation of caer, as y gaer, the fortress.

Gallt, a hill; in construction, allt.

Gardd, a garden.

Garth, a promontory.

Gelli, a grove of hazels.

Glan, the brink, bank; glan y mÔr, the sea side.

GlÂs, blue, grey, green.

Glyn, a glen.

Gorsav, a station, stand.

Grug, heath.

Gwaelod, a bottom.

Gwaen, a large plain.

Gwern, watery meadow. Alder.

Gwydd, wood.

Gwyn, white. Fem. gwen, wen.

Gwyrdd, green. Fem. gwerdd, werdd.

Havod, a summer dwelling.

Hen, old. Hendre, old mansion.

Heol, a street.

Hir, long.

IÂl, open country.

Is, lower. Isav, lowest.

Llain, a long piece.

Llan, a church; a village with a church.

Llawr, a floor.

Llech, a flat stone, slate, slab.

Lluest, an encampment.

Llwyd, grey, hoary.

Llwyn, a grove, a bush, a copse.

Llyn, a lake, pool.

Llys, a court, a palace.

Maen, a stone. Pl. meini.

Maenor, a manor.

Maes, an open field.

Mall, bad, rotten.

Man, a place.

Mawn, peat. Mawnog, a turbary.

Mawr, great, large.

Melin, a mill.

Melyn, yellow.

Merthyr, a martyr.

Moel, bald, bare; a bare hill.

MÔn, Anglesey.

MÔr, the sea.

Morva, a marsh.

Mynach, a monk.

Mynydd, a mountain.

Nant, a brook, ravine, glen.

Neuadd, a hall.

Newydd, new.

Ochr, a side.

Pant, a hollow.

Parth, a division, a part.

Pen, a head.

Penmaen, a promontory, a rocky head.

Penrhyn, a promontory, a cape.

Pentrev, a village, a hamlet.

Perth, a brake, a thornbush.

Pistyll, a spout of water.

PlÂs, a mansion, a hall.

Plwyv, a parish.

Pont, a bridge.

Porth, a gate, a ferry.

Pwll, a pit, a pool.

Rhaiadr, a cataract, a waterfall.

Rhiw, a slope.

RhÔs, a moor.

Rhudd, crimson, ruddy.

Rhyd, a ford. Rhydycroesau, the ford of the Crosses.

Sarn, a causeway.

Serth, steep, abrupt.

Swydd, an office, a county.

Tal, the head or front. Talcen, the forehead.

Tan, under.

Tervyn, the boundary.

Tir, the earth.

Tommen, a tumulus.

Traeth, a sand.

Trev, a town.

Tri, three.

Troed, a foot. Pl. traed, feet.

Trwyn, a nose.

Twr, a tower.

Ty, a house. Pl. Tai, houses.

Tyddyn, a farm.

Tywyn, a strand, a sandy shore.

Uchav, highest.

Uwch, higher.

Y, the.

Yn, in.

Ynys, an island.

Yspytty, a hospital.

Ystlys, the side, the flank.

Ystrad, a flat, a vale.

Ystum, a bend.

Ystwyth, flexible.