roo (uncountable)
roo (plural roos)
roo
From Middle English roo, ro, from Old English rō, rōw (“quietness, quiet, rest”), from Proto-Germanic *rōwō (“quiet, rest”), from Proto-Indo-European *ere(w)-, *rē(w)- (“quiet”). Cognate with Scots ro, ruve (“peace, repose”), German Ruhe (“rest, peace, tranquility”), Danish and Swedish ro (“rest, peace, tranquility”), Icelandic ró (“tranquility, quietness”).