adolesce means to become adolescent; to pass through adolescence. Lexicurio rates it Sui generis — a strength score of 91 out of 100.
adolesce is pronounced /ˌædəˈlɛs/.
Etymology
Back-formation from adolescence. First attested in 1859.
verb
- to become adolescent; to pass through adolescence.“The children are beginning to adolesce around the age of 12.”