Right
奄 supplies the sound — yǎn unchanged.
奄 itself pictures a person
大 with a covering, meaning 'to cover suddenly, envelop'. So the semantics align: hand
扌 + cover
奄 = to cover with the hand. Same phonetic family:
庵 nunnery,
俺 I (dialectal),
淹 submerge — all share the yǎn / ān reading.