‘Dà kū’ literally combines ‘dà’ (big, loud) and ‘kū’ (to cry), forming a compound verb meaning ‘to cry loudly’—typically with intense emotion such as grief, frustration, or overwhelming joy. Unlike the neutral verb ‘kū’ alone, ‘dà kū’ emphasizes volume, duration, and emotional intensity, often implying loss of composure. It is commonly used in spoken and written Chinese to describe unrestrained, audible crying, especially by children or adults in moments of deep distress.

This expression appears frequently in storytelling, news reports, and everyday descriptions—e.g., describing a child’s reaction to falling, someone hearing tragic news, or even exaggerated comedic scenes. While it carries no formal register restrictions, it’s less common in highly formal documents unless narrating an emotionally charged event. The phrase does not take aspect particles like ‘le’ or ‘guò’ without modification (e.g., ‘dà kū le’ is acceptable but implies completion; ‘dà kū zhe’ for ongoing action requires careful context).