The crossword solutions for the term 'KEEPING QUIET' are 'MUM' (3 letters) and 'SEDATING' (8 letters). 'MUM' is a British English term meaning 'SILENT' or 'not saying anything'. It is often used to describe someone who is not speaking or is keeping quiet. 'Sedating' is an adjective that means to have a calming or soothing effect, often used in reference to drugs or medications. In this context, it can be interpreted as having a calming effect on someone, encouraging them to keep quiet.