astonish

Origin

Probably an alteration (due to words ending in -ish: abolish, banish, cherish, establish, furnish, etc.) of earlier astony, astone, astun (“to astonish, stun”), from Middle English astoneyen, astonen (“to stun, astonish”), variant of stonen, stoneyen (“to stun, astonish”) prefixed with a-. However, compare Old French estonir, a rare variant of estoner (“to stun, astonish”).