نَّاصِبَةٌ

A word in the Arabic language will either be 1) a verb or 2) a noun or 3) a particle – نَّاصِبَةٌ is a noun

A noun may either be 1) Definite or indefinite 2) Masculine or feminine 3) Singular, dual or plural 4) Nominative, accusative or genitive

نَّاصِبَةٌ is the natural state of this indefinite noun and it is in this state ( مَرْفُوْعٌ) when the noun is: 1) the subject المُبْتَدَأُ or 2) the predicate الخَبَرُ or 3) اسْمُ كَانَ or 4) خَبَرُ إِنَّ or 5) الفَاعِلُ subject of a verb in the active voice or 6) نَائِبُ الفَاعِلِ subject of a verb in the passive voice or 7) it’s a noun of dependent declension a) نَعْتٌ / صِفَطٌ adjectives b) التَّوْكِيْدُ emphatic c) المَعْطُوْفٌ conjunction d) البَدَلُ synonym

Weary; Wornout

To fix, raise, setup, establish

Surah/Below is the only verse in the holy Quran containing the feminine, active particleنَّاصِبَةٌ
Verse
88-3Laboring, wearyعَامِلَةٌ نَّاصِبَةٌ