reiterate
Concise Oxford English Dictionary © 2008 Oxford University Press:
reiterate/riˈɪtəreɪt/
▶verb say something again or repeatedly.
– derivatives
reiteration noun,
reiterative adjective.
reiteration noun,
reiterative adjective.
– origin ME: from L. reiterat-, reiterare ‘go over again’.
'reiterate' also found in these Oxford entries:

