Strike heavily is a phrase that describes the action of using physical force to hit something with great intensity. The crossword solutions for this term are SMITE (5 letters), SLUG (4 letters), BASH (4 letters), and RAM (3 letters). SMITE means to strike with great force, while SLUG is a verb meaning to hit someone or something with a lot of force. BASH is another verb meaning to hit something hard, and RAM is an action of forcefully pushing against something.