The term 'On Thin Ice' is often used to describe a situation that is PRECARIOUS and uncertain. The crossword solutions for this term are PRECARIOUS (10 letters) and INASPOT (7 letters). PRECARIOUS means being in a dangerous or delicate situation, while INASPOT means being in a difficult or awkward position. Both words accurately describe the phrase 'On Thin Ice, ' which is used to describe a situation that is uncertain and potentially hazardous.