Where does “ἐγρήγορᾰ” come from?

ἐγρήγορᾰ (Ancient Greek) comes from Ancient Greek ἐγείρω, from Proto-Hellenic egéřřō, from Proto-Indo-European h₁ger- — to be awake, to awaken; to be awake, to wake up.

Ancestry of “ἐγρήγορᾰ”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ἐγείρω	to awaken, wake up, rouse, stir; to rouse, stir...
2	Proto-Hellenic	egéřřō	—
3	Proto-Indo-European	h₁ger-	to be awake, to awaken; to be awake, to wake up

Every word from Proto-Indo-European h₁ger- →Every word from Proto-Hellenic egéřřō →Every word from Ancient Greek ἐγείρω →