動き
うごき · ugoki · JLPT N1 · noun
motion
動く (ugoku, to move) drops its ending to become the noun 動き: a moving, i.e. movement or activity
Ugoku is the verb 'to move'; its noun form ugoki works like hataraku becoming hataraki. The kanji 動 means move, so 動き covers physical movement, activity, and a trend.