yínhángkǎ dòngjié le, bùnéng zhuǎnzhàng.

The bank card is frozen, so money cannot be transferred.

Breakdown of yínhángkǎ dòngjié le, bùnéng zhuǎnzhàng.

• 了le: change-of-state particle
• 银行卡yínhángkǎ: bank card
• 冻结dòngjié: to freeze

Questions & Answers about yínhángkǎ dòngjié le, bùnéng zhuǎnzhàng.

Why is 了 used after 冻结?

Here, 了 marks a new situation or completed change of state: the bank card has become frozen / is now frozen.

So 银行卡冻结了 does not just describe freezing in the abstract. It tells you that this status has happened and is now relevant.

Compare:

• 银行卡冻结。 = a very bare, written-style statement like The bank card is frozen or Bank cards are frozen
• 银行卡冻结了。 = The bank card got frozen / has been frozen / is now frozen

In everyday speech, 了 often appears when reporting something that has just happened or when the speaker is pointing out a changed condition.

Why isn’t it 被冻结了 instead of 冻结了?

Both are possible, but they are a little different in style and focus.

• 银行卡冻结了 = common, natural, concise; focuses on the result/state
• 银行卡被冻结了 = explicitly passive, The bank card was frozen; focuses more on the action done to it

In Chinese, you often do not need a passive marker like 被 when the meaning is already clear from context. Since a bank card does not freeze itself, 冻结了 is enough.

So this sentence sounds very natural in everyday use.

Is 冻结 a verb here or an adjective?