Definition

Describing something that is difficult to deal with or requires a lot of effort and trouble.

Example

The new regulations imposed onerous requirements on small businesses.

Comparatives & Superlatives

Conversation

I’ve been thinking about taking on that new project at work.

Isn't it a bit onerous? I've heard it requires a lot of effort.

Yeah, I've heard the same, but I think it could be worth it in the end.

True, just make sure it doesn't overwhelm you!

Synonyms & Antonyms

Root Explanation

Onerous → It is derived from the Latin word "onerous" (meaning burdensome or heavy), which comes from "onus" (meaning burden). The word "onerous" describes something that is burdensome or requires a lot of effort.

Memory Tip

Think of a 'burden' ('onus') that is 'heavy' or 'difficult' to carry — that's why onerous means something that is burdensome.

Visually Confused Words