suasive Syllabification: (sua·sive)Pronunciation: /ˈswāsiv/Definition of suasive adjective serving to persuade. Grammar denoting a class of English verbs, for example, insist, whose meaning includes the notion of persuading and that take a subordinate clause whose verb may either be in the subjunctive or take a modal. suasive in other Oxford dictionaries Definition of suasive in the British & World English dictionary