Synonyms of 'clamp'
fastenDictionary, fix, secure
U-bolts are used to clamp the microphones to the pole.
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If you brace yourself against something or brace part of your body against it, you press against something in order to steady your body or to avoid falling.
He braced his back against the wall.
Thesaurus for clamp from the Collins English Thesaurus
A clamp is a device that holds two things firmly together.