This is the 570th most frequent Persian word.
ارشد
"ارشد" means "senior" or "master's (degree)."
In this sentence, 'ارشد' is used as part of the term 'کارشناسی ارشد' to denote a master's degree program.
او دانشجوی کارشناسی ارشد است.
He is a master's degree student.
Here, 'ارشد' is used to indicate seniority in a professional position.
او مهندس ارشد در شرکت است.
He is the senior engineer at the company.
In this context, 'ارشد' describes a team that is senior or higher-ranked.