From Longman Dictionary of Contemporary Englishrearmre‧arm /riːˈɑːm $ -ˈɑːrm/ verb [intransitive, transitive] PMWto obtain weapons again or provide someone else with new weapons They returned to base to rearm. —rearmament noun [uncountable]→ See Verb table
Examples from the Corpus
rearm• They remain opposed to any suggestion that the country should be allowed to rearm.• Both sides' armies were rearming heavily for combat. 