أصعب

In a sentence

• كان تسلق الجبل أصعب تحدٍ واجهته هذا العام.

  Climbing the mountain was the hardest challenge I faced this year.

  In this sentence, 'أصعب' is used as a qualitative adjective in the superlative form, describing the most difficult challenge.

• وجدت أن تعلم اللغة اليابانية أصعب مما توقعت.

  I found learning Japanese to be harder than I expected.

  Here, 'أصعب' is used comparatively to indicate that learning Japanese was harder when compared to the speaker's expectations.

• الإجابة صحيحة، لكن الطريقة التي أوضحتها كانت أصعب للطلاب.

  The answer is correct, but the method you explained was more difficult for the students.

  In this usage, 'أصعب' compares two methodologies, stating that one was more difficult than the other for the students.