Definition

Relating to or involving betrayal of one's country or government.

Example

The spy was charged with treasonous activities against the state.

Conversation

Did you hear about the news regarding the politician?

Yeah, it's pretty shocking — some people are calling his actions treasonous.

I can't believe he would risk everything for that, it's so reckless.

Exactly, it makes you wonder about his true intentions.

Synonyms & Antonyms

Root Explanation

Treasonous → It is formed from "treason" (from Old French *traïson*, meaning betrayal or treachery) and the suffix "-ous" (meaning full of or characterized by). The word "treasonous" describes actions that are full of betrayal or treachery against one's country or sovereign.

Memory Tip

Think of 'treason' as betrayal and remember that 'treasonous' means full of betrayal.

Visually Confused Words