tiger (n.) Look up tiger at Dictionary.com
Old English tigras (plural), also in part from Old French tigre "tiger" (mid-12c.), both from Latin tigris "tiger," from Greek tigris, possibly from an Iranian source akin to Old Persian tigra- "sharp, pointed," Avestan tighri- "arrow," in reference to its springing on its prey, "but no application of either word, or any derivative, to the tiger is known in Zend." [OED]. Of tiger-like persons from c.1500. The meaning "shriek or howl at the end of a cheer" is recorded from 1845, American English, and is variously explained. Tiger's-eye "yellowish-brown quartz" is recorded from 1886.