An example of cantankerous is a grumpy old man who lives on your street who is always watching the neighborhood kids to find something to yell at them about.
Disliked her cantankerous landlord.
Origin of cantankerous
- Perhaps from Middle English contek dissension (influenced by such words as rancorous) (cankerous) from Anglo-Norman contec possibly from Latin contāctus past participle of contingere to touch contact
From American Heritage Dictionary of the English Language, 5th Edition