WWordGenerator.org GeneratorsWord ListsBlogAboutGenerate a word Home / C / clam up clam up verb 7 letters Scrabble 12 WWF 17 Definitions verb refuse to talk or stop talking; fall silent be quietbelt upbutton upclose updummy upkeep mumshut up Look “clam up” up elsewhere Wiktionary ↗ Merriam-Webster ↗ Etymonline ↗ Dictionary.com ↗ Want another word?Spin the dictionary for a fresh one. Generate a word →