"one-time, former," 1580s, from earlier use as an adverb ("formerly") and a noun ("former holder" of some office or position), both 1530s, from Latin quondam (adv.) "formerly, at some time, at one time; once in a while," from quom, cum "when, as" (see who) + demonstrative ending -dam.
实用例句
1. Structure of quondam long - canister discharging - fluid valve is analysed and ameliorated and its and cost is lowered.
