名詞 groundwork:

1. the fundamental assumptions from which something is begun or developed or calculated or explained
   同義詞：basis, base, foundation, fundament, cornerstone
2. lowest support of a structure
   同義詞：foundation, base, fundament, foot, substructure, understructure
3. preliminary preparation as a basis or foundation

1. Constant practice is the groundwork for success in play the piano.
   要彈得一手好鋼琴，經常練習才是根本。
2. The groundwork or source of something.
   基礎，根源某事物的基礎工作或根源

ground.work

n.（名詞）
A foundation; a basis.See Synonyms at base
基礎；根本參見 base