godan verb (-u)
Archaic godan verb meaning to rest or relax; not used in modern everyday Japanese. Found in classical literature or poetic contexts.
古の旅人は木陰にて安らう。
Travelers of old would rest in the shade of trees.
「やすらう」は現代ではほとんど
'Yasurau' is an archaic word that is hardly used today.