ばんぜんき 万全を期す Show inflections LinksSentence search for 万全を期すSentence search for ばんぜんをきすKanji details for 万, 全 and 期Edit in JMdict Expressions (phrases, clauses, etc.), Godan verb with 'su' ending1. to make absolutely sure (that all is right); to use every means; to take all possible measures Discussions Log in to talk about this word.