ADV

boldly, confidently, emphatically, forcefully, strongly
The report asserts confidently that the industry will grow
directly, explicitly
simply
He had no real evidence?he simply asserted that what he said was true
repeatedly
rightly

ADV

successfully
They successfully asserted their right to protect their homes

VERB + ASSERT

need to
be determined to, wish to
She wished to assert her independence from her parents
seek to, try to
be able to, manage to
He managed to assert his power over the media
be unable to, fail to