insomnia

n. 失眠症

insinuate, insinuation, insipid, insipidity, insipidly, insist, insist on sth. (doing sth.), insist upon, insistence, insistent, insistently, insofar, insofar as, insole, insolence, insolent, insolently, insoluble, insolvency, insolvent, insomniac, insomuch, insouciance, insouciant, Insp, inspect, inspection, inspector, inspector of taxes (also tax inspector), inspectorate, inspiration, inspirational, inspire, inspired, inspiring, Inst, instability, instable, install, install (US also instal),