Reserved
来自Big Physics
Middle English: from Old French reserver, from Latin reservare ‘keep back’, from re- ‘back’ + servare ‘to keep’.
etymonline
reserved (adj.)
c. 1600, "guarded" (in manner), "averse to showing familiarity," past-participle adjective from reserve (v.). The meaning "set or kept apart for another or future purpose" is by 1610s; specifically of seats, tables, etc., "set aside for a future use," especially by a particular person, from 1858.
