clamp (n.) Look up clamp at Dictionary.com
device for fastening, c.1300, probably from clamb, perhaps originally past tense of climb (v.), or from Middle Dutch clampe (Dutch klamp), from West Germanic *klamp- "clamp, cleat;" cognate with Middle Low German klampe "clasp, hook," Old High German klampfer "clip, clamp;" also probably related to Middle Dutch klamme "a clamp, hook, grapple," Danish klamme "a clamp, cramp," Old English clamm "fetter;" see clam (n.).
clamp (v.) Look up clamp at Dictionary.com
"to fasten with a clamp," 1670s, from clamp (n.). Related: Clamped; clamping.