侍う

Etymology 1
→ → * →

Compound of a prefix sa- (possibly the same sa meaning "really, truly", as mentioned in some derivations of ) and the verb, the iterative or repetitive conjugation of.

Verb

 * 1) to wait for a chance
 * 2) to serve by one's side

Etymology 2
→ →  → * →

Sound shift from earlier.

Verb

 * 1) to serve by one's side
 * 2)  to be

Etymology 3
→ →  →  → * →

Sound shift from earlier.

Verb

 * 1)  to be
 * 2) verbal suffix