This is the 334th most frequent Vietnamese word.
hiểu
"Hiểu" means "to understand."
'Hiểu' here indicates an empathetic or emotional understanding of someone's feelings.
Cô ấy hiểu lòng tôi rất rõ.
She understands my heart very well.
'Hiểu' is used here to express a deep understanding or insight into a matter.
Anh ấy hiểu rõ tình hình hiện tại.
He understands the current situation clearly.
'Hiểu' is used here to denote comprehension or the lack thereof.