Cantankerous (adjective)

1. Bad-tempered, difficult to deal with, and easily irritated.
2. Having a stubborn and contrary disposition.

Origin:

The word "cantankerous" is derived from the word "cantanker" which means to be ill-tempered, difficult, and irritable. .

Examples:

1. The old man was cantankerous and never had a kind word to say.
2. The customer was cantankerous and made a scene in the store.
3. The patient was cantankerous and made the nurses' job difficult.
4. The cantankerous dog barked and growled at anyone who came near it.
5. He was known for his cantankerous attitude and always had a grumpy expression.