Puberty
late Middle English: from Latin pubertas, from puber ‘adult’, related to pubes (see pubes).
wiktionary
From Middle English pūbertē, from Old French puberté, from Latin pubertas(“the age of maturity, manhood”), from pubes(“youth, pubic hair, youthfulness”), puber(“grown up, of mature age, adult; of plants, downy, pubescent”).
etymonline
puberty (n.)
"condition of being able to reproduce, sexual maturity," or, as Johnson has it, "the time of life in which the two sexes begin first to be acquainted;" late 14c., pubertē, from Old French puberté and directly from Latin pubertatem (nominative pubertas) "age of maturity, manhood," from pubes (genitive pubertis) "adult, full-grown, manly," also, as a noun, "the signs of manhood, the private parts; grown-up males," a word of uncertain origin. Related: Puberal; pubertal.