frizz v.

late 13c., "cook (something) in a shallow pan over a fire," from Old French frire "to fry" (13c.), from Latin frigere "to roast or fry," from PIE *bher- "to cook, bake" (source also of Sanskrit bhrjjati "roasts," bharjanah "roasting;" Persian birishtan "to roast;" perhaps also Greek phrygein "to roast, bake"). Intransitive sense is from late 14c. U.S. slang meaning "execute in the electric chair" is U.S. slang from 1929. As a noun, "fried meat," from 1630s. Related: Fried; frying. Frying pan is recorded from mid-14c. (friing panne).

"curl hair," 1560s, of obscure origin. There are words of similar sound and sense in Old English (fris "curly"), Old Frisian (frisle), French (friser "to curl") but their history is tangled; probably connected somehow to frizz (v.). Related: Frizzled; frizzling. As a noun from 1610s, "a short curl," from the verb. Frizzling iron was a 17c. term for "curling iron."