estomaquer

Definition: (informal) to stun, stagger, flabbergast, gobsmack

Ses nouvelles m'ont estomaqué - His news stunned me

Il a resté bouche bée, estomaqué - He stood open-mouthed, flabbergasted

(click the little graphic below to hear the Mot du jour pronounced)

Pronunciation: [eh stuh ma kay]Audio Link