The Vietnamese word "ấm ứ" is a verb that describes the action of hesitating or being indecisive. It often refers to someone who is not sure about what to say or how to respond, leading them to take a long time to answer or to give an unclear response.
You can use "ấm ứ" when talking about situations where someone is reluctant to give a straightforward answer or when they are thinking for too long before responding.
"Cô ấy ấm ứ không trả lời câu hỏi."
"Anh ta ấm ứ mãi không biết phải nói gì."