耽溺 is a formal, literary verb meaning 'to indulge excessively' or 'to become obsessively preoccupied with something,' often in a harmful or self-destructive way. The character 耽 (dān) means 'to delay' or 'to linger,' suggesting prolonged, unproductive attention; 溺 (nì) literally means 'to drown' and metaphorically conveys being overwhelmed or consumed — together, they evoke the image of sinking deeply into an activity or emotion until one loses balance or control.

This word carries strong negative connotations and is commonly used in written Chinese, essays, news reports, or psychological discussions to describe unhealthy attachments — such as addiction to games, social media, romantic fantasies, or escapist behaviors. It implies loss of self-regulation and often appears with nouns like 网络 (internet), 游戏 (games), or 虚幻 (illusions). Unlike neutral words like 喜欢 (to like) or even 热爱 (to be passionate about), 耽溺 always signals imbalance and potential harm.