increase (v.)youdaoicibaDictYouDict
early 14c., "become greater in size or number; to cause to grow, enlarge," from Anglo-French encress-, Old French encreiss-, present participle stem of encreistre, from Latin increscere "to increase, to grow upon, grow over, swell, grow into," from in- "in" (see in- (2)) + crescere "to grow" (see crescent). Latin spelling restored 15c. Related: Increased; increasing.
juvenescent (adj.)youdaoicibaDictYouDict
1821, from Latin iuvenescentem (nominative iuvenescens), present participle of iuvenescere "to grow into youth," from iuvenis "young" (see young).