Where does “отпускной” come from?

отпускной (Russian) comes from Russian о́тпуск, from Russian отпускать, from Russian от-, from Proto-Slavic otъ-.

отпускной (Russian): vacation; selling

Definitions

vacation; selling

Ancestry of “отпускной”, step by step

Step	Language	Word	Meaning
1	Russian	о́тпуск	—
2	Russian	отпускать	—
3	Russian	от-	away from
4	Proto-Slavic	otъ-	—

Every word from Proto-Slavic otъ- →

отпускной — Etymology, Origin & Word History | Etymology Explorer