Answer: reasserts

AnswerCrossword Clue
REASSERTSReaffirms.
REASSERTSMaintains again and again.
REASSERTSStates for emphasis.
REASSERTSConfirms
REASSERTSPushes forward again
REASSERTSSays not for the first time
reassertsREASSERT, to assert again