Old High German slaf

← Old English slǣp (cognate)

← Proto-Germanic *slap- (inherited)

← Proto-Germanic *slēpaną (mention)

← Proto-Germanic *slēpaz (inherited)

← Proto-West Germanic *slāp (inherited)

← Old High German slāfan (link)

← Old Norse slappi (cognate)

← Old Saxon slāp (cognate)

→ German schlaff (inherited)