"Assert," "avow," "declare," and "affirm" all mean to state positively usually in the face of denial or objection. Use "assert" to suggest the announcement of something with confidence and often without need for proof or evidence. ("I assert that our team can win the game.") Try "avow" for a forceful statement that accepts responsibility. ("The newspaper avowed responsibility for its mistake.") You can use "declare" for an open or public statement. ("Rachael declared that she would run for class president.") Choose "affirm" to suggest a firm belief based on evidence, experience, or faith. ("The author's speech affirmed that there is good in everyone.")