How to pronounce sigh

1 : to take or let out a long loud breath often as an expression of sadness or weariness. 2 : to make a sound like sighing Wind was sighing in the branches. 3 : to say with a sigh “Oh, dear,” she sighed.

H is silent in many English words, for various reasons. Not all such words that have come into English from French still have a silent h, however. Over the centuries we have come to pronounce the h in words like horrible, hospital, host, human, and humour.