Effect
Action, Operation
noun, verbal noun
さよう
作用 (さよう) Effect, Action, Operation
仕草 (しぐさ) Gesture, Action, Behavior
活動 (かつどう) Activity
行動 (こうどう) Action, Behavior
作業 (さぎょう) Work, Task, Operation
操作 (そうさ) Operation, Handling, Manipulation
左様なら (さようなら、kana only、not on WK) Farewell, Adieu, Goodbye, So Long
Words with 作 read as サ have Operation as a meaning.