In-conclusiveness refers to a lack of definitive, conclusive results or outcomes. Antonyms for this word include decisiveness, certainty, finality, and resolution. Decisiveness is the opposite of in-conclusiveness, indicating a clear and firm decision or conclusion. Certainty implies a strong conviction or assurance, leaving no room for doubt or ambiguity. Finality denotes something that is conclusive and definitive, with no further possibility of adjustment or revision. Resolution suggests a determination to find a clear and successful solution or outcome. These antonyms provide a range of options to express a sense of determination, assurance, and clarity, delivering more impact to your communication.