The term "more approbative" refers to a positive or approving attitude toward something. The antonyms for this term would be disapproving, negative, critical, condemning, or unfavorable. These antonyms describe an attitude that is not supportive, praising, or accepting. Disapproving means expressing an unfavorable view of something. Negative means unfavorable, not affirmative or positive. Critical is expressing adverse or disapproving comments or judgments. Condemning means expressing strong disapproval or censure. Unfavorable means not approving or supportive. Hence, these antonyms indicate an attitude of dissent or criticism that is opposite to an approbative attitude.