発はつ育いく盛ざかりMeaningsNoun1. period of rapid growthKanji used発let out育nurture盛a heap ofComposed of発はつ育いく(physical) growth; developmentNoun盛さかりheight (e.g. of summer); peak (e.g. of cherry blossom season); (in) season; full bloom; full swing (of a party, etc.); prime (of one's life); (one's) best days; bloom; (being in) heat; rutNoun