Which word describes feelings or displays that are excessively sentimental?

The word "mawkish" aptly captures the essence of feelings or displays that are excessively sentimental. When something is described as mawkish, it often implies a level of sentimentality that is not only strong but also overly sweet or insincere, to the point of being somewhat distasteful. This term generally has a negative connotation, suggesting that the emotions or displays are exaggerated and lack authenticity.

In contrast, the other terms present very different meanings. "Stoic" refers to someone who is unaffected by emotions, often remaining calm and composed in difficult situations. "Genuine" describes feelings or displays that are sincere and authentic, which is the opposite of what "mawkish" conveys. "Reserved" typically denotes someone who does not openly express their emotions, indicating restraint rather than excessive sentimentality. Hence, "mawkish" is the most appropriate word to describe overly sentimental feelings or displays.