οὑροί
From LSJ
αὔριον ὔμμε πάσας ἐγὼ λουσῶ Συβαρίτιδος ἔνδοθι λίμνας → tomorrow I'll wash you one and all in Sybaris lake
Frisk Etymological English
Grammatical information: m. pl.
Meaning: trench or keel-furrow, in which ships are pulled into the sea (Β 153).
Origin: XX [etym. unknown]
Etymology: Morpholog. and etymolog. uncertain. One connects both the words mentioned s. ὅρος frontier and also ὀρύσσω (?) (Kretschmer Glotta 12, 187, Bechtel Lex., who at the same time reminds of OCS rovъ ditch, hole). Further hypotheses w. lit. in WP. 2, 352 f., W.-Hofmann s. aperiō, also Forbes Glotta 36, 247; older lit. in Bq.
