Webster's Revised Unabridged Dictionary · 1913

Thar

Thar , noun

(Zoology) A goatlike animal (Capra Jemlaica) native of the Himalayas. It has small, flattened horns, curved directly backward. The hair of the neck, shoulders, and chest of the male is very long, reaching to the knees. Called also serow, and imo.

Thar , v. impersonal, pres.

[Old English thar, þarf, Anglo-Saxon þearf, infin. þurfan to need; akin to Old High German durfan, German durfen to be allowed, Icelandic þurfa to need, Gothic þaúrban.]

It needs; need. [Obsolete] — Piers Plowman
What thar thee reck or care? — Chaucer