﴿ نَاصِيَةٍۢ كَٰذِبَةٍ خَاطِئَةٍۢ ﴾

“the lying, rebellious forehead! –”

a lying iniquitous forelock! nāsiyatin an indefinite noun substituting for a definite — the description of this forelock in such terms is meant figuratively and what is actually meant is that individual.