差
JLPT HSK 3

chā, chà, chāi, cī
Top: sheep 羊 with a bent leg ノ, below: craftsman, construction 工
A sheep with a bent leg and a craftsman: what a difference!

	搓
JLPT HSK 6

cuō
Left: hand 扌, right: difference 差 (A sheep 羊 with a bent ノ leg and a craftsman 工 have a difference.)
In your hand you have (wool from) the sheep and it is work (when spinning) to rub or twist it.

	磋
JLPT HSK 6

cuō
Left: stone 石, right: difference 差 (A sheep 羊 with a bent ノ leg and a craftsman 工: what a difference!)
Like stones, differences collide in: a consultation.

	嗟
JLPT no HSK

jiē
Left: mouth 口, right: difference 差 (A sheep 羊 with a bent ノ leg and a craftsman 工: what a difference!)
The sound [= what comes out of the mouth] of the sheep with the crooked leg at work was: a sigh.