Definition

Not able to be trusted or depended on; often fails to perform as expected.

Example

The weather forecast was unreliable, so we decided to bring our umbrellas just in case.

Conversation

I really don't trust him anymore; he's so unreliable.

Yeah, I've noticed that too, especially with his promises.

It's frustrating because I thought he would change.

I guess some people just can't be counted on.

Synonyms & Antonyms

Root Explanation

Unreliable → It is formed from "un-" (meaning not) and "reliable" (from Latin "reliabilis", meaning able to be relied on). The word "unreliable" means not able to be depended upon or trusted.

Memory Tip

Think of 'not' ('un-') being added to 'able to be relied on' ('reliable') — that's why unreliable means something you cannot trust.

Visually Confused Words