磨砂機

sander / sanding machine

to rub / to grind / to polish / to sharpen / to wear down / to die out / to waste time / to pester / to insist

grindstone / to grind / to turn round

sand / gravel / granule / variant of 沙[sha1]

to scrub with an abrasive / to sand / frosted (e.g. glass)

(bound form) machine; mechanism / (bound form) aircraft / (bound form) an opportunity / (bound form) crucial point; pivot / (bound form) quick-witted; flexible / (bound form) organic