coffer (n.)
mid-13c., "box or chest used for keeping valuables," from Old French cofre "a chest" (12c., Modern French coffre), from Latin cophinus "basket" (see coffin). Hence coffers, in a figurative sense, "a treasury; the wealth and pecuniary resources of a person, institution, etc.," late 14c.
ceiling (n.)
mid-14c., celynge, "act of paneling a room," noun formed (with -ing) from Middle English verb ceil "put a cover or ceiling over," later "cover (walls) with wainscoting, panels, etc." (early 15c.); from Old French celer "to conceal," also "cover with paneling" (12c.), from Latin celare "to hide" (from PIE root *kel- (1) "to cover, conceal, save"). Probably influenced by Latin caelum "heaven, sky" (see celestial).
Extended to the paneling itself from late 14c., then to lath-and-plaster work. The meaning "interior overhead surface of a room" is attested by 1530s; by late 19c. the meaning "wainscoting" was only in provincial English. Figurative sense "upper limit" is from 1934. Colloquial figurative phras