いっこく 一刻 Common word Show 1 collocation 一刻を争う - to race against time LinksSentence search for 一刻Sentence search for いっこくKanji details for 一 and 刻Edit in JMdict Noun1. a moment; a minute; an instantいっこく一刻のゆうよ猶予もゆる許されなかった。Not a moment could be lost.Na-adjective (keiyodoshi)2. stubborn; obstinateDated term, also written as 一国, 一克, 一剋 Discussions Log in to talk about this word.