Where does “зачитаться” come from?

зачитаться (Russian) comes from Russian зачита́ть, from Russian чита́ть, from Proto-Slavic čitati, from Proto-Balto-Slavic skait-, from Proto-Indo-European skey-, from Proto-Indo-European sek- — to cut, cut off, sever.

зачитаться (Russian): to get carried away reading, to read too long

Definitions

to get carried away reading, to read too long

Ancestry of “зачитаться”, step by step

Step	Language	Word	Meaning
1	Russian	зачита́ть	to read out
2	Russian	чита́ть	to read
3	Proto-Slavic	čitati	to read; to count
4	Proto-Balto-Slavic	skait-	—
5	Proto-Indo-European	skey-	to split, to dissect
6	Proto-Indo-European	sek-	to cut, cut off, sever

Every word from Proto-Indo-European sek- →Every word from Proto-Indo-European skey- →Every word from Proto-Balto-Slavic skait- →