What is an antonym of shrugged?

There isn't a single perfect antonym for "shrugged" because it depends on the context. Here are some options depending on the situation:

If "shrugged" means "to express indifference or lack of knowledge":

* Acknowledged

* Responded

* Reacted

* Cared (as in "He cared about the problem")

* Paid attention

If "shrugged" means "to raise one's shoulders":

* Lowered

* Dropped

* Sunk

If "shrugged" implies a specific action like "shrugged off a coat":

* Put on

* Donned

* Adjusted

It's best to consider the context and choose the word that best expresses the opposite meaning you are trying to convey.