This is the 3871st most frequent Arabic word.
المشارك
"The participant."
In this sentence, "المشارك" (the participant) refers to an individual who is taking part in the conference.
حضر المشارك في المؤتمر لتقديم عرضه.
The participant attended the conference to present his presentation.
Here, "المشارك" designates someone enrolled in a training course.
يتلقى المشارك في الدورة التدريبية شهادة عند انتهائها.
The participant in the training course receives a certificate upon its completion.
In this case, "المشارك" refers to someone who took part in the competition.