The word "fiery" is an adjective that describes something as being intense, passionate or full of energy. It can be used to describe a person who has strong emotions and opinions, or it can refer to a situation where there is a lot of excitement, anger or enthusiasm. In terms of physical objects, "fiery" could mean something that is bright red in color, like flames or fire itself. The word comes from the idea of fire being hot, intense and powerful - so when you use it to describe someone or something, it implies a strong presence or energy.