foul------ a violation of the rules-------including kicking,pushing,shoving(挤),tripping(拌摔)and dangerous or aggressive play------for which an official often awards a free kick.A player commits foul on someone else or simply fouls someone else.Professional foul ,in which a foul committed intentionally on an attacker just outside the defender's penalty area,is often used to prevent a scoring opportunity without incurring a penalty shot.The players may be sent off if he or she committed serious fouls.