curliest
cur-li-est
adjective
Having the most curls or the tightest coils; the superlative form of 'curly'.
"She has the curliest hair I've ever seen."
Thesaurus
Synonyms: kinky, curled, permed, ringleted, curling, frizzly, nappy, frizzy, wavy, crisp, curly
Antonyms: straight