Which word means hard to please?

The word "finicky" is used to describe someone who is difficult to satisfy or very particular about their tastes, often requiring everything to be just right. This term captures the essence of being hard to please, as it implies an excessive concern for details or a fastidious nature. For example, a finicky eater might only want very specific types of food and can be easily displeased by anything outside their narrow preferences.

The other options do not convey this meaning. "Fidelity" refers to faithfulness or loyalty, "fetter" means to restrain or shackles, and "fetish" typically indicates an excessive or irrational devotion to something, which does not relate to being hard to please. Therefore, "finicky" is the term that accurately describes someone who is hard to satisfy, highlighting a picky or demanding attitude in various situations.