Archaic prefix meaning 'full of life' or 'vigorous'. Found only in a few old compounds; not productive in modern Japanese.
In the old compound 生血, 生 was read いく and meant vital, life-giving blood.
longevity stone
lifetime; one's whole life; all through life
The reading いく is an archaic native Japanese prefix related to 生きる (to live). Its exact historical derivation is uncertain.