Where does “λείψω” come from?

λείψω (Greek) comes from Greek λείπω, from Ancient Greek λείπω, from Proto-Indo-European leykʷ- — to leave.

Ancestry of “λείψω”, step by step

Step	Language	Word	Meaning
1	Greek	λείπω	absent, missing; lack
2	Ancient Greek	λείπω	I leave, leave behind; I leave alone, release; I...
3	Proto-Indo-European	leykʷ-	to leave