Ardent spirits are typically characterized as highly enthusiastic or passionate. Antonyms that could be used to describe a lack of these qualities and instead convey feelings of disinterest, apathy, or cold indifference may include words like dispassionate, emotionless, lukewarm, or indifferent. These antonyms reflect a lack of emotional investment or enthusiasm that is commonly associated with the term ardent. Instead of being highly motivated or driven by a strong desire, these descriptors suggest a more reserved, detached approach. By considering opposing or contrasting terms to ardent spirits, a more nuanced understanding of the concept can be achieved while also expanding one's vocabulary.