This is the 4638th most frequent Arabic word.
اختلف
"اختلف" means "to differ" or "to disagree."
Here, 'اختلف' indicates a difference or divergence in opinions among the individuals involved.
اختلف الأصدقاء في آرائهم حول الفيلم.
The friends disagreed on their opinions about the movie.
In this sentence, 'اختلفت' refers to variation or change in appearance or characteristics.
اختلفت ألوان السماء عند غروب الشمس.
The colors of the sky varied during sunset.
Here, 'اختلفا' denotes a dissimilarity in the methods or approaches used by the subjects.