Which word pertains to the appreciation of beauty?

The term that pertains to the appreciation of beauty is "aesthetic." Aesthetics is a branch of philosophy dealing with the nature of beauty, art, and taste, as well as the creation and appreciation of beauty. It involves the study of what is considered beautiful and the criteria we use to judge it. This concept is fundamental in various fields, including art, music, literature, and design, as it helps to articulate how we experience and interpret beauty in different forms.

The other terms do have their own significance in artistic discourse but do not directly pertain to the appreciation of beauty. For example, dissonance typically refers to a lack of harmony or tension in music or visual art, while artistry speaks to the skill and creativity involved in creating art. Expressionism is a specific art movement that emphasizes the expression of emotional experience rather than physical reality. Each of these plays a role in the larger context of art and beauty but does not directly define the appreciation of beauty itself as the term "aesthetic" does.