Verb

(en verb)

To declare with assurance or plainly and strongly; to state positively.

* {{quote-magazine, year=2012, month=March-April

, author=Colin Allen , title=Do I See What You See? , volume=100, issue=2, page=168 , magazine=(American Scientist) citation , passage=Numerous experimental tests and other observations have been offered in favor of animal mind reading, and although many scientists are skeptical, others assert that humans are not the only species capable of representing what others do and don’t perceive and know.}}

he would often assert his beliefs to us

To use or exercise and thereby prove the existence of.

to assert one's authority

Salman Rushdie has asserted his right ... to be identified as the author of this work

To maintain or defend, as a cause or a claim, by words or measures; to vindicate a claim or title to; as, to assert our rights and liberties.

The quasi-judicial pre-grant process of asserting patent rights and appeals procedures during patent examination; 'to assert' patent rights means to defend or maintain patent rights.

(computer science) To make true; to make equal to 1. (rfex)

Verb

(en-verb) (intransitive'' or ''transitive )

To make a declaration, or give evidence, under oath.

* 2014 , (Ruzwana Bashir), " The untold story of how a culture of shame perpetuates abuse. I know, I was a victim", The Guardian , 29 August 2014:

It was only after a decade away from Skipton that I was finally able to garner the courage to return and testify against my abuser.

* Bible, Numbers xxxv. 30

One witness shall not testify against any person to cause him to die.

To make a statement based on personal knowledge or faith.

* Bible, John iii. 11

We speak that we do know, and testify that we have seen; and ye receive not our witness.