Where does “Θρασύβουλος” come from?

Θρασύβουλος (Ancient Greek) comes from Ancient Greek βουλή, from Ancient Greek βούλομαι, from Proto-Indo-European gʷel-, from Proto-Indo-European kel- — to hit; beat; to pierce, to stab; goblet.

Ancestry of “Θρασύβουλος”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	βουλή	will, determination, decision; plan, project,...
2	Ancient Greek	βούλομαι	usually stronger than ἐθέλω , implying choice or...
3	Proto-Indo-European	gʷel-	throat; to swallow; throat; to dribble; gush...
4	Proto-Indo-European	kel-	to hit; beat; to pierce, to stab; goblet

Every word from Proto-Indo-European kel- →