unicorn
‘a mythical animal with a single long horn in the middle of its forehead’
Lexical development traced from the Tamil root:
E. vnicorne, vnycorne, wnicorne, unycorn < O.F. unicorne < La.Lat. unicornus < Lat. unicornis ‘having one horn’ < uni- ‘one’ + cornus ‘horn’ < yoonuh < oi-no- < Tamil oṉṟu