Smash is defined as to shatter, wreck or hit very hard.(verb)
The definition of a smash is a loud breaking sound, a crash, or a hard overhand stroke.(noun)
See smash in Webster's New World College Dictionary
Origin: prob. < s-, intens. + mash
See smash in American Heritage Dictionary 4
verb smashed, smash·ing, smash·es verb, transitive
Origin: Probably of imitative origin.
Learn more about smash