Impossible vs. Improbable — What's the Difference?

Difference Between Impossible and Improbable
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Definitions
Impossible➦
Not able to occur, exist, or be done
It was almost impossible to keep up with him
A seemingly impossible task
Improbable➦
Unlikely to take place or be true.
Impossible➦
Incapable of having existence or of occurring.
Improbable➦
Not likely to be true.
It's highly improbable that aliens abducted you.
Impossible➦
Not capable of being accomplished
An impossible goal.
Improbable➦
Not likely to happen.
Due to the loss of power, it is improbable that we will begin on time.
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Impossible➦
Unacceptable; intolerable
Impossible behavior.
Improbable➦
Not probable; unlikely to be true; not to be expected under the circumstances or in the usual course of events; as, an improbable story or event.
He . . . sent to Elutherius, then bishop of Rome, an improbable letter, as some of the contents discover.
Impossible➦
Extremely difficult to deal with or tolerate
An impossible child.
An impossible situation.
Improbable➦
Not likely to be true or to occur or to have occurred;
Legislation on the question is highly unlikely
An improbable event
Impossible➦
Not possible; not able to be done or happen.
It is difficult, if not impossible, to memorize 20,000 consecutive numbers.
Sarah thinks that nothing is impossible because things can always somehow happen.
Improbable➦
Having a probability to low to inspire belief
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Impossible➦
Very difficult to deal with.
You never listen to a word I say – you're impossible!
Improbable➦
Too improbable to admit of belief;
A tall story
Impossible➦
Imaginary
Impossible quantities, or imaginary numbers
Impossible➦
An impossibility.
Impossible➦
A skateboard trick consisting of a backflip performed in midair.
Impossible➦
Not possible; incapable of being done, of existing, etc.; unattainable in the nature of things, or by means at command; insuperably difficult under the circumstances; absurd or impracticable; not feasible.
With men this is impossible; but with God all things are possible.
Without faith it is impossible to please him.
Impossible➦
An impossibility; as, he tried to do the impossible.
"Madam," quoth he, "this were an impossible!"
Impossible➦
Something that cannot be done;
His assignment verged on the impossible
Impossible➦
Not capable of occurring or being accomplished or dealt with;
An impossible dream
An impossible situation
Impossible➦
Totally unlikely
Impossible➦
Used of persons or their behavior;
Impossible behavior
Insufferable insolence