The crossword solution for the term 'PUTS IN FIRMLY' is IMBEDS, which is a 6-letter word. Imbeds means to fix something firmly in place, usually by embedding it in a surrounding material. It is often used when referring to objects that are set into a surface, such as nails or screws. Imbedding is also used to describe the process of inserting an object into a larger structure, such as a piece of furniture into a wall.