(Classical Japanese) to be watching continuously, to be on watch repeatedly, to be on look out / (Classical Japanese) to protect something, to take care of something

(archaic) to stand watch over something, to be on the lookout for something (such as a watchman controlling entry to a place) / (archaic) to protect or defend something, to ensure that something is safe

護る: to protect, to defend / to watch carefully / to abide (by rules), to observe (regulations)

(medicine) the Hippocratic oath

(literary) they (about women or girls)