hinaw

Etymology
Compare.

The idiomatic sense is from The Bible's account of Pontius Pilate washing his hands and refusing to condemn Jesus.

Verb

 * 1) to wash one's hands or another's
 * 2)  to wash one's hands of; to absolve oneself of responsibility or future blame for; to refuse to have any further involvement with

Etymology
From, from.

Noun

 * 1) washing of one's hands or feet