Proceed quietly is an instruction to move forward without making any noise. It can be used in a variety of contexts, such as when someone is trying to sneak around or when someone is trying to avoid disturbing others. The term can also be used figuratively, such as when someone is trying to make progress on a project without drawing too much attention. The crossword solution for this term is 'TIPTOE, ' which is an action that is often associated with the concept of proceeding quietly. Tiptoeing involves taking small steps and placing the feet lightly on the ground in order to minimize the sound of footsteps.