share (n.1) Look up share at Dictionary.com
"portion," O.E. scearu "a cutting, shearing, division," related to sceran "to cut," from P.Gmc. *skaro- (cf. O.H.G. scara "troop, share of forced labor," Ger. Schar "troop, band," prop. "a part of an army," O.N. skör "rim"), from PIE base *sker- "to cut" (see shear). Meaning "part of the capital of a joint stock company" is first attested 1601. Shareholder first attested 1828. To share-crop is first recorded 1867.
share (n.2) Look up share at Dictionary.com
"iron blade of a plow," O.E. scear, scær "plowshare," prop. "that which cuts," from P.Gmc. *skar- (cf. O.Fris. skere, M.L.G. schar, O.H.G. scar, Ger. Schar, Du. ploegschaar, M.H.G. pfluocschar), from PIE base *(s)ker- "to cut" (see shear).
share (v.) Look up share at Dictionary.com
1586, to apportion to someone as his share," from share (n.1). Meaning "to divide one's own and give part to others" is recorded from 1592.