An Etymological Dictionary of Astronomy and Astrophysics

1a) The full or proper portion or part allotted or belonging to or contributed or owed by an individual or group.

1b) One of the equal fractional parts into which the capital stock of a joint-stock company or a corporation is divided.

2a) To divide and distribute in shares; apportion.

2b) To use, participate in, enjoy, receive, etc., jointly (Dictionary.com).

Etymology (EN): M.E., from O.E. scearu “a cutting, shearing; a part or division,” related to sceran “to cut;” O.H.G. scara “troop, share of forced labor,” Ger. Schar “troop, band,” properly “a part of an army,” O.N. skör “rim;” from PIE root *(s)ker- “to cut.”

Etymology (PE): Bâš, from Kurd. (Sorani) baš “share, part;” variant of baxš “share, portion;” baxšidan “to divide,” → division; bâž “tribute, toll, impost,” → distribute.