Words for floor / ground in Celtic languages:
| Proto-Celtic | *ɸlārom = floor |
|---|---|
| Old Irish (Goídelc) | lár = floor / ground |
| Irish (Gaeilge) | lár [l̪ˠɑːɾˠ / l̪ˠæːɾˠ] = floor, ground, middle, centre |
| Scottish Gaelic (Gàidhlig) | làr [l̪ˠaːɾ] = floor, ground, storey, middle, centre |
| Manx (Gaelg) | laare = storey, deck, floor, bottom, flat, set, sill, level |
| Proto-Brythonic | *lọr [ˈlɔːr] = floor |
| Old Welsh | laur = floor |
| Middle Welsh (Kymraec) | llawr, llaur = floor |
| Welsh (Cymraeg) | llawr [ɬau̯r] = floor, deck, gallery, stage, platform, cellar, basement, ground, bottom (of sea) |
| Old Cornish | lor = floor |
| Cornish (Kernewek) | leur = floor, ground |
| Old Breton | lor = floor |
| Breton (Brezhoneg) | leur = floor, ground, area |
Etymology: from the Proto-Indo-European word *pleh₂- (to be flat), which is also the root of the English word floor [source].
Sources: Wiktionary, Am Faclair Beag, teanglann.ie, On-Line Manx Dictionary, Geiriadur Prifysgol Cymru, Gerlyver Kernewek, Dictionnaire Favereau
