擦 - grate, rub, scratch

to rub; to scrub; to scrape

scratch; graze; scrape; abrasion

to rub; to chafe; to strike (match); to file; to frost (glass)

friction

grazing; skimming; almost touching; passing within inches; being within a whisker; shaving close

rubdown with a dry towel

liniment; ointment; salve

chafing; sore; scrape; scratch; mark; rub; rubbing together; blister

worldly wise; sophisticated; street smart; knowledge of the world (acquired in the school of hard knocks); toughness

fire alarm ringing continuously to warn that a fire is extremely near

kinetic friction

to have become worn