Activity
来自Big Physics
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late Middle English: from French activité or late Latin activitas, from Latin act- ‘done’, from the verb agere .
wiktionary
From Middle French activité, from Latin activitas. Equivalent to active + -ity.
etymonline
activity (n.)
c. 1400, "active or secular life," from Old French activité, from Medieval Latin activitatem (nominative activitas), a word in Scholastic philosophy, from Latin activus "active" (see active). Meaning "state of being active, briskness, liveliness" recorded from 1520s; that of "capacity for acting on matter" is from 1540s. As "an educational exercise," 1923.
