推敲 （スイコウ） polishing (a piece of writing), improvement, revision, refinement

月下推敲 （ゲッカスイコウ） polish, elaboration, repeatedly working over one's writing, being very scrupulous in the choice of diction

叩く （たたく） to strike, to hit, to beat, to knock, to pound, to bang, to slap, to spank, to tap, to pat, to clap (one's hands), to play (the drums), to attack, to bash, to criticize, to censure, to flame (on the Internet), to sound out (someone's views), to pound (meat or fish), to chop into small pieces, to beat down the price, to talk (big, bad, idly, etc.), to call, to invoke (e.g. a function)