Out-gushing is a word that refers to excessive expression, such as emotions or words. The antonyms for out-gushing, on the other hand, can be described by words or phrases that denote restraint, caution, and control. These could include words like contained, reserved, muted, subdued, or understated. In transitioning from out-gushing to antonyms thereof, one might attempt to adopt a more measured approach, perhaps by taking a pause before responding to a situation or by choosing less evocative language. Being less reflexive in one's expression can help in promoting an image of stability, thoughtfulness, and maturity.