The term 'not affected' can be represented by four crossword solutions: NATURAL (7 letters), IMMUNE (6 letters), SINCERE (7 letters), and TRUE (4 letters). NATURAL refers to something that is not artificial or man-made, while IMMUNE implies being resistant to a particular disease or illness. Sincerity is the quality of being honest and truthful, and TRUE is the opposite of false. All of these words together suggest that something is unaffected by outside influences and remains genuine and authentic.