mission
/ˈmɪʃən/·미션·noun
an important task or assignment
LatinCEFR A2
Root
Latin 'mittere' (to send) + -ion (act, result)
Latin missio (a sending) → Old French mission → English mission
In a word
Latin missio = 'a sending'. A mission is what someone carries when they're sent somewhere. A spacecraft, a charity, even a single life — all the same at root: dispatched to a place, given something to do there. "Mission impossible" thrills because the root already says: a duty received.
Examples
The astronauts completed their mission.
Her mission in life is to help children.
The team set off on a rescue mission.
Related
submittransmitemitdismissmissionary