Where does “dirmi” come from?

dirmi (Italian) comes from Italian dire, from Latin dīcere, from Proto-Italic deikō, from Proto-Indo-European deyḱ- — to point out.

Ancestry of “dirmi”, step by step

Step	Language	Word	Meaning
1	Italian	dire	to say, tell; to recite; to mean
2	Latin	dīcere	—
3	Proto-Italic	deikō	show, indicate; refer to; say, tell
4	Proto-Indo-European	deyḱ-	to point out