MOOD' (4 letters) The term 'hard-to-describe sensation' can be summarized by two crossword solutions: 'VIBE' and 'MOOD'. VIBE is a term used to describe the atmosphere or feeling of a place, situation, or person. It is often used to refer to the emotional energy that someone or something gives off. MOOD, on the other hand, is a more general term used to describe a person's emotional state. It can be used to describe a person's feelings at any given moment, or over a longer period of time. Both terms are used to describe a hard-to-describe sensation, as they both refer to an intangible feeling or atmosphere.