The word "uneffusive" suggests restraint and reserve, so its antonyms would convey a sense of warmth, enthusiasm, or expressiveness. Some words that can be considered as antonyms for "more uneffusive" are exuberant, effusive, gushing, demonstrative, or expressive. For example, someone who is exuberant may express their feelings with great enthusiasm and energy, while someone who is effusive may go on and on about something they love. A gushing individual may be overly emotional or prone to gushing words of praise, whereas someone who is demonstrative freely displays their emotions in a heartfelt manner. Expressive individuals may convey their feelings through body language, tone, and gestures.