素昧平生 sù mèi píng shēng 🔊 to have never met sb before + Keep this word Meanings sù mèi píng shēng (idiom) to have never met sb before; entirely unacquainted Its characters 素sùraw silkHSK 7–9昧mèito conceal平píngflat; level; smoothHSK 5生shēngto growHSK 4