The term 'held firmly' can be described by five different crossword solutions: clutched (8 letters), clasped (7 letters), ADHERED (7 letters), vised (5 letters), and RIVETED (7 letters). Clutching is a grasping action, usually with the hands, that is used to hold something tightly. Clasping is a similar action, but usually involves two hands coming together to hold something. Adhering is the process of sticking something to another object, often using glue or tape. Vising is a mechanical action that uses a tool to hold something in place. Lastly, riveting is a process of joining two pieces of metal together by hammering a rivet into a hole.