An Etymological Dictionary of Astronomy and Astrophysics

To tie, to fasten, to cause ti stick together.

Etymology (EN): O.E. bindan “to tie up with bonds,”
PIE base *bhendh- “to bind;” cf. Av./O.Pers. band- “to bind, fetter,” banda- “band, tie,” Skt. bandh- “to bind, tie, fasten,” bandhah “a tying, bandage.”

Etymology (PE): Bandidan “to bind, confine” [Mo’in, Dehxodâ], from band “band, tie” + -idan infinitive suffix; cognate with E. bind, as explained above.