1. Beginning to be; becoming: juvenescent.
2. Characterized by; resembling: opalescent.
[French, from Old French, from Latin -ēscēns, -ēscent-, present participle suff. of inchoative verbs in -ēscere.]
suffix forming adjectives
beginning to be, do, show, etc: convalescent; luminescent.
[via Old French from Latin -ēscent-, stem of present participial suffix of -ēscere, ending of inceptive verbs]
-escence suffix forming nouns
a suffix of adjectives borrowed from Latin, where it had an inchoative force (convalescent; recrudescent); also used with the sense “giving off light" of the kind or in the manner specified ( fluorescent; iridescent).