exclaim (v.) Look up exclaim at Dictionary.com
1560s, back-formation from exclamation or else from Middle French exclamer (16c.), from Latin exclamare "cry out loud, call out," from ex "out," perhaps here an intensive prefix (see ex-), + clamare "cry, shout, call" (see claim (v.)). Spelling influenced by claim. Related: Exclaimed; exclaiming.