adjective

impossible

impossible

It's impossible to finish this work today.

It's impossible to finish this work today.

He is an impossible person to work with.

He is an impossible person to work with.

It is impossible ((to-inf)) It is impossible to know everything.

an impossible ((noun)) He gave me an impossible task.

Synonyms: unachievable, unattainable; Antonyms: possible, feasible

From the prefix 'im-' (not) + 'possible' (able to be done). Derived from Latin 'impossibilis'.

Think of the phrase 'I'm possible', then add the negative prefix 'im-' to remember the spelling and meaning.

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