The term LIKE A NOBLE GAS can be summarized by the crossword solution INERT, which means 'not reactive or not participating in chemical reactions'. Noble gases are a group of elements that are found in the periodic table and are characterized by their lack of reactivity. They are also known as 'INERT gases' because they do not form compounds with other elements. The term LIKE A NOBLE GAS is used to describe something that is not reactive or participating in chemical reactions, just like a noble gas.