Proto-IE: *reidh-
Meaning: to put in order, to make comfortable
Tokharian: A ritk- 'raise, produce', B rätk- 'heal' (Adams 531)
Celtic: *reidi- > Ir rēid `planus, facilis', maige rēidi `befahrbare Felder'; OCymr ruid `prosperus, expeditus, minime impeditus', Cymr rhwydd `prosperus, expeditus, minime impeditus'
Russ. meaning: упорядочивать, делать удобным
References: WP II 348 f