disapprovingly

To act or speak disapprovingly means to show your lack of approval through your words, actions, or facial expressions. It's a way of communicating that you find something unacceptable, undesirable, or incorrect. Unlike simply disagreeing with someone, acting disapprovingly carries a weight of judgment and often implies criticism.

The key is how something is done. You might politely point out an error ("That calculation seems off"), or you might glare at the person who made it and say, "Really? That's what you came up with?" The second example is delivered disapprovingly.

You'll often see "disapprovingly" used to describe non-verbal cues. For instance: "The judge looked disapprovingly at the defendant," or "She raised an eyebrow disapprovingly when he told her his plans." It can also modify verbs, like in this example: "He sighed disapprovingly."

It's important to note that acting disapprovingly isn't always about being openly hostile. Sometimes it's a subtle expression of disappointment or concern. However, it almost always conveys a negative evaluation.

So, if you notice someone shaking their head, frowning, or speaking with a critical tone while observing something, chances are they are reacting disapprovingly—signaling that they don't approve and likely judging the situation negatively.