Balky describes someone or something that stubbornly refuses to cooperate or move forward. A balky horse might plant its feet and refuse to cross a stream, no matter how much the rider urges it on. A balky washing machine stops mid-cycle for no clear reason, leaving you with sopping wet clothes.

The word captures that frustrating quality of stubborn resistance. When your computer becomes balky, it freezes or ignores your commands. A balky student might resist doing homework even when they know it's required. Unlike simple slowness, balkiness has an element of refusal or resistance built into it.

You'll often hear balky used with machines and animals, but it works for people too. A balky teammate won't follow through on their part of a group project. A balky car engine sputters and hesitates instead of starting smoothly. Whether it's a stubborn mule, a malfunctioning printer, or a person digging in their heels, balky perfectly describes that exasperating moment when something just won't do what it's supposed to do.