juvenescent
adj.
1821, from Latin iuvenescentem (nominative iuvenescens), present participle of iuvenescere "to grow into youth," from iuvenis "young" (see young).
〔李〕[juven;-escenta.] a.从婴儿期向青少年过渡的 ←juven (L juvenis)=young 年青的
〔蒋〕[juven=young年轻，年少，-escent形容词后缀，表示逐渐形成某种状态的] 由婴儿期向青年过渡的