サツ, す.る, す.れる, ず.れ, こす.る, こす.れる
grate, rub, scratch, scrape, chafe, scour
JLPT1 G7 S17 F1485
As per 察# (rub spotless) + 手 hand/action indicator → *rub* spotless → *chafe*; *rustle*. Also, *run through* (one's money) (← be reduced to threadbare clothes) → *become worldly-wise*. 擦 was devised to replace 察 after the latter's transformation of meanings.
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