Definition

Something that cannot be done or achieved; it is extremely difficult or not possible to accomplish.

Example

Climbing that mountain without proper gear is impossible.

Conversation

I can't believe you think we can finish this project in one day.

Yeah, it feels like an impossible task right now.

Exactly! We should really plan it out over the week instead.

Good idea, that way we can avoid any impossible deadlines.

Synonyms & Antonyms

Root Explanation

Impossible → It is formed from "in-" (meaning not) and "posse" (meaning to be able). The word "impossible" describes something that cannot be done or achieved, indicating a lack of ability to accomplish it.

Memory Tip

Think of 'not' ('in-') being able to do something ('posse') — that's why impossible means something that cannot be done.

Visually Confused Words