[المكتشفة]

thank you a lot brother
that's really beneficial
i have other expressions as
he is a dark horse
"we call someone a dark horse when we don't wait his success for example in the baccalaureat exam all the teachers say that that pupil will be the 1st but when they see the results they will find another pupil that they don't think that he'll be the 1st so in english we say he is a dark horse