英语词源字典 - 在线词源网站

care-taker (n.)[care-taker 词源字典]: also caretaker, 1769, from care (n.) + agent noun of take (v.). The back-formed verb caretake is attested by 1890.[care-taker etymology, care-taker origin, 英语词源]
concierge (n.): 1640s, from French concierge "caretaker, doorkeeper, porter" (12c.), probably from Vulgar Latin *conservius, from Latin conservus "fellow slave," from com- "with" (see com-) + servius "slave" (see serve (v.)).
janitor (n.): 1580s, "an usher in a school," later "doorkeeper" (1620s), from Latin ianitor "doorkeeper, porter," from ianua "door, entrance, gate," from ianus "arched passageway, arcade" (see Janus) + agent suffix -tor. Meaning "caretaker of a building" first recorded 1708.
providence (n.): late 14c., "foresight, prudent anticipation," from Old French providence "divine providence, foresight" (12c.) and directly from Latin providentia "foresight, precaution, foreknowledge," from providentem (nominative providens), present participle of providere (see provide).

Providence (usually capitalized) "God as beneficent caretaker," first recorded c. 1600, from earlier use of the word for "God's beneficient care or guidance" (14c.), short for divine providence, etc. The noun in Latin occasionally had a similar sense.
purser (n.): mid-15c., "treasurer," especially "caretaker of accounts and provisions on a ship," originally also "maker of purses" (late 15c.), agent noun from Middle English purse (see purse (n.)). From late 13c. as a surname.