生いくいくMeanings1prefixvital; virile; livelyarchaicArchaic prefix meaning 'full of life' or 'vigorous'. Found only in a few old compounds; not productive in modern Japanese.「生いく血ち」の「生いく」は、古ふるくは「いく」と読よまれ、活かつ力りょくのある血ちを意い味みした。In the old compound 生血, 生 was read いく and meant vital, life-giving blood.