The term 'not still' can be represented by two crossword solutions: ASTIR and INMOTION. ASTIR is a 5-letter word meaning 'stirring, active, or busy'. It is derived from the Latin verb 'astare', which means 'to stand'. INMOTION is an 8-letter word meaning 'in motion, moving, or active'. It is derived from the Latin phrase 'in motu', which translates to 'in motion'. Both words are used to describe something that is not still or inactive.