The word 尽兴 (jìnxìng) is a compound formed through the combination of two meaningful characters: 尽 (jìn), which means "to exhaust" or "to the utmost", and 兴 (xìng), meaning "interest", "mood", or "enthusiasm". Together, they create an idiomatic expression where the first character modifies the second in a resultative manner, literally conveying the idea of "exhausting one's interest/enthusiasm". This structure figuratively means to enjoy oneself to the fullest, to have a thoroughly satisfying and uninhibitedly good time, until one's desire for pleasure is completely satiated. It exemplifies a common pattern in Chinese vocabulary where two characters synergize to express an abstract, nuanced state or action.