شك

In a sentence

• لدي شك في الإجابة الصحيحة.

  I have doubt about the correct answer.

  Here, 'شك' refers to uncertainty or lack of surety about something.

• شك العالم في اكتشافاته دفعه لإعادة التجربة.

  The scientist's doubt in his discoveries drove him to reperform the experiment.

  In this case, 'شك' designates a questioning attitude or reconsideration of the findings.

• بدون شك، هذا هو أفضل قرار.

  Without doubt, this is the best decision.

  Here, 'شك' is used in an idiomatic expression to convey assuredness or certainty.