مستحيل

In a sentence

• هذا الأمر مستحيل.

  This matter is impossible.

  Here, 'مستحيل' ('impossible') is used as an adjective describing a situation or task that cannot logically occur.

• أن تُصبح الشمس زرقاء؟ مستحيل!

  For the sun to become blue? Impossible!

  In this instance, 'مستحيل' is used as an interjectory exclamation to express incredulity towards an improbable scenario.

• قال لي إنه سينهي العمل في دقيقة؛ قلت له: مستحيل.

  He told me he would finish the task in a minute; I told him: Impossible.

  Here, 'مستحيل' is employed to directly and succinctly convey disbelief in a statement or claim.