From <span class="searchmatch">Proto</span>-Celtic *koilos (“thin”), from <span class="searchmatch">Proto</span>-Indo-European *koyHlo- (Latvian kails (“bare, naked”)). Cognate with Old Irish cáel. *<span class="searchmatch">kʉl</span> narrow Old Cornish:...
comparison as semantically dubious. *koilos thin, narrow <span class="searchmatch">Proto</span>-<span class="searchmatch">Brythonic</span>: *<span class="searchmatch">kʉl</span> Old Cornish: cul Cornish: <span class="searchmatch">kul</span> Welsh: cul Old Irish: coíl, cóel Middle Irish: cáel...
the -u- is harder to explain that way. *kulɸom n sin violation <span class="searchmatch">Proto</span>-<span class="searchmatch">Brythonic</span>: *<span class="searchmatch">kul</span> Old Breton: col Middle Welsh: cwl, kwl, cul Welsh: cŵl Old Irish:...
Walloon: coye → Middle Dutch: cul Dutch: <span class="searchmatch">kul</span> Old Occitan: colh m, colha f Occitan: colha Borrowings: → <span class="searchmatch">Proto</span>-<span class="searchmatch">Brythonic</span>: *köll f Breton: kell Cornish: kell...