奈秒

nanosecond, ns, 10^-9 s (Tw) / PRC equivalent: 納秒|纳秒[na4 miao3]

used in expressions that convey frustration and futility, such as 無奈|无奈[wu2 nai4] and 莫可奈何|莫可奈何[mo4 ke3 nai4 he2] (literary) / used for its phonetic value in writing foreign words

second (unit of time) / arc second (angular measurement unit) / (coll.) instantly