基本功

basic skills / fundamentals

basic / fundamental / main / elementary

(bound form) base; foundation / (bound form) radical (chemistry) / (bound form) gay (loanword from English into Cantonese, Jyutping: gei1, followed by orthographic borrowing from Cantonese)

root / stem / origin / source / this / the current / original / inherent / originally / classifier for books, periodicals, files etc

meritorious deed or service / achievement / result / service / accomplishment / work (physics)