assert

(verb) state categorically. Synonyms: asseverate, maintain.

(verb) to declare or affirm solemnly and formally as true. Synonyms: affirm, verify, avow, aver, swan, swear. Examples: "Before god i swear i am innocent."

(verb) insist on having one's opinions and rights recognized. Synonyms: put forward. Examples: "Women should assert themselves more!."

(verb) assert to be true. Synonyms: insist. Examples: "The letter asserts a free society."