Scrubbing
来自Big Physics
etymonline
scrubbing (n.)
1680s, "rubbing with a hard brush," verbal noun from scrub (v.). Scrubbing-brush is from 1680s. Scrubbing-board "washboard, corrugated board on which clothes are scrubbed" is by 1889.
scrubbing (n.)
1680s, "rubbing with a hard brush," verbal noun from scrub (v.). Scrubbing-brush is from 1680s. Scrubbing-board "washboard, corrugated board on which clothes are scrubbed" is by 1889.
