Makes Groovy' is an expression that means to make something better or more enjoyable. Ruts, which has four letters, refers to a deep trench or furrow in the ground caused by the repeated passing of wheels or animals. GOUGES, which has six letters, refers to a tool used for carving out grooves or notches in wood or other materials. Together, these two words can be used to describe the process of making something better or more enjoyable, as the expression 'Makes Groovy' implies.