膝痒搔背 xīyǎngsāobèi to miss the point Origin Definitions Defs Strokes Stroke Words Sentences Sents 膝 xī noun knee (bound form) knee; the joint between the thigh and the lower leg痒 癢 yǎng adjectiveverb to itch to itch; to tickle; itchy; a ticklish or itching sensation搔背 sāobèi to scratch one's back To use one's fingernails to scratch an itch on the back.