What does "yearning" signify in emotional terms?

"Yearning" in emotional terms signifies a deep and intense feeling of longing or desire for something, typically something that is not easily attainable. This word conveys a profound emotional state, often characterized by a sense of longing that is more significant than just a casual interest or fleeting thought. The essence of yearning encapsulates a persistent emotional pull toward an ideal, person, or situation, often accompanied by feelings of nostalgia or unmet needs.

In contrast, the other options do not capture the depth associated with yearning. Casual interest implies a surface-level attraction without emotional weight, fleeting thought suggests something temporary and easily dismissed, while contentment and satisfaction denote feelings of fulfillment and happiness, which stands in opposition to the sense of desire implicit in yearning. Thus, the choice denoting deep longing accurately embodies the emotional nuances that "yearning" conveys.