The Vietnamese word "lã chã" refers to the action of something flowing down in a gentle, often continuous manner. It is commonly used to describe tears when they fall down the cheeks.
In poetry or literature, "lã chã" can evoke deep emotions and create a vivid image of sorrow or melancholy. For example, you might find it in a line describing someone's emotional state as they cry.
While "lã chã" primarily refers to tears flowing down, it can also be used metaphorically to describe the flowing of other liquids or even abstract concepts like time or memories.
In Vietnamese literature, tears are often depicted as a symbol of deep emotional pain, and the phrase "lã chã" captures that imagery beautifully. The line "giọt châu lả chã khôn cầm" from Nguyễn Du suggests that her tears are flowing down endlessly, which is a powerful expression of sorrow.