تَغبّب
1.
is apparently from الغِبُّ in the sense of العَاقِبَةُ, and thus synonym with تَعَقَّبَ signifying He looked to the consequence, end, issue, or result, of an affair: see its particle n. مُتَغَبِّبْ, below.]
2.
See [also] 2, first sentence.