Retiring
来自Big Physics
mid 16th century (in the sense ‘withdraw to a place of safety or seclusion’): from French retirer, from re- ‘back’ + tirer ‘draw’.
etymonline
retiring (adj.)
1580s, "departing, retreating," present-participle adjective from retire (v.). Also "fond of retiring, disposed to seclusion," hence "unobtrusive, modest, subdued" (1766).
