The crossword solution for the term 'CLOSE HARD' is SLAM, which is a four-letter word. SLAM is a verb that means to shut with force and noise, or to hit something hard. It can also be used to describe a loud, forceful expression of disapproval or criticism. SLAM is often used in sports, such as basketball, when a player slams the ball into the hoop. It can also be used to describe a powerful musical performance.