Ostensively is an adverb that means in a way that shows or intends to show something clearly or convincingly. Its antonyms are words that oppose its meaning and express the opposite. Some antonyms for ostensively are obscurely, secretly, covertly, discreetly, invisibly, inscrutably, and unobtrusively. If a person is working ostensively, they are conveying their message in a transparent and understandable way. But if they were working covertly, they would be doing the opposite; they would be keeping their intentions hidden or secret. When we use antonyms, we can enrich our vocabulary, enhance our communication, and express our ideas more precisely.