stolid - dull
If a person is described as being ‘stolid’, then they do not tend to get excited or angry about anything and show little or no emotion. While there are some words with a similar meaning, such as ‘stoic’, that have positive connotations, this term is used negatively to express disapproval as it is associated with dullness.
Our manager is not somebody you can have a chat and a laugh with. He is a very stolid, serious man.
Due to the stolidity of that country’s delegates, the negotiations were hampered by a stuffy and very formal atmosphere.
I was trying to explain the situation to Anne, but she seemed totally indifferent. She just sat staring stolidly into space.