atone
‘make amends (for), reconcile, appease, expiate, be in accordance’
Lexical development traced from the Tamil root:
E. attone < atonen ‘in accord’ < at < ad- ‘to, near, at’ + one < O.E. an (adjective, pronoun, noun) ‘one’ < Proto-G. ainaz < one < oi-no- < Tamil oṉṟu