ث ق بth-q-b
(ن) ثَقَبَ يَثْقُبُ ثَقْبًاthaqaba yathqubu thaqban: to bore, to pierce; and from this, for light to break through.
ثَاقِبthāqib (active participle, ism fāʿil): shining, piercing through the darkness. Twice in the Quran, both times as an attribute of a star: ﴿النَّجْمُ الثَّاقِبُ﴾ (Aṭ-Ṭāriq 86:3); ﴿شِهَابٌ ثَاقِبٌ﴾ (Aṣ-Ṣāffāt 37:10)