The quality of being self-assured and assertive.

plural of assertiveness

To declare with assurance or plainly and strongly; to state positively. / To use or exercise and thereby prove the existence of.

(computer science) an assertion; a section of source code which tests whether an expected condition is true.

The act of asserting; positive declaration or averment. / Something which is asserted; a declaration; a statement asserted. / A statement or declaration which lacks support or evidence.

Boldly self-assured; confident without being aggressive.

stated, declared or alleged, especially with confidence but no proof

simple past tense and past participle of assert

In an assertive manner.

Third-person singular simple present indicative form of assert