The word "in-conclusivenesses" refers to a lack of clarity or certainty in something. Antonyms of this word include conclusiveness, decisiveness, certainty, clarity, and definiteness. Conclusiveness refers to the quality of being conclusive or settling an issue beyond doubt. Decisiveness implies the ability to make quick and firm decisions. Certainty emphasizes absolute confidence in something. Clarity refers to the ability to clearly perceive, understand, and communicate a message. Finally, definiteness highlights the importance of being precise, specific, and unambiguous. By using these antonyms, we can convey a clear, confident, and unambiguous message, free from any ambiguity or uncertainty.