impossible

Unable to happen or be done.

• That would be impossible.
• The door was impossible to open.
• It is almost impossible to find a seat here.

How to use it: it is impossible to do something (It is impossible to read in complete darkness.); it is impossible for someone to do something (It is impossible for me to arrive before noon.)

Similar words: unachievable, unfeasible

Opposites: possible

Common phrases: impossible task, almost impossible, impossible to do, impossible for someone

Very difficult to deal with because someone refuses to listen, agree, or behave reasonably.

• You're being impossible!
• He becomes impossible when he is tired.
• She's impossible to please, whatever you cook.

Similar words: difficult, unreasonable, unmanageable

Opposites: reasonable, cooperative

Common phrases: be impossible, impossible child, impossible to please, being impossible