Proto-IE: *lēd- (~ -ā-)
Meaning: to weaken, to tire (tr.)
Old Greek: l[ē]déō <lēdẹ̄̂n> `уставать, утомляться' (Hsch.), aor. ptc. lēdḗsas (Hsch.)
Latin: lassus, -a `lass, müde, abgespannt'
Albanian: ĺoɵ `mache müde', ĺoδem `werde mühe'
Russ. meaning: ослаблять, утомлять
References: WP II 394 f