When describing a feeling or a certain indescribable quality of an object or concept, the phrase "certain something" is often used. However, there are a number of synonyms that can be employed to add variety and specificity to one's language. For example, the word "je ne sais quoi" is a French phrase used to describe an intangible quality that adds charm or appeal to something. Other synonyms can include words such as "aura," "essence," or "mystique." By using these alternative phrases, writers can create a more vivid and descriptive image of the intangible qualities they wish to convey.