To sadden is to make someone feel sad, or to become sad. The death of a beloved dog is likely to sadden the whole family.

You can say that it saddens your friends when they see vulnerable people bullied or discriminated against. You can also say that your friends sadden you when they tell you about pollution that's causing animals to go extinct. Before the verb sadden came along in the 17th century, the verb meaning "to make sad" was sade, from an Old English root.

Definitions of sadden

v make unhappy

“The news of her death saddened me”
gladden, joy
make glad or happy
weigh down, weigh on
be oppressive or disheartening to
Type of:
affect, impress, move, strike
have an emotional or cognitive impact upon

v come to feel sad

become glad or happy
Type of:
experience, feel
undergo an emotional sensation or be in a particular state of mind

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