HSK 7-9
核对
héduì动
to check; to verify; to audit; to examine
登机员逐张核对乘客证件。
Dēng jī yuán zhú zhāng hé duì chéng kè zhèng jiàn.
The boarding agent checked each passenger's document one by one.
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Other HSK words sharing a character
Also free:
Appears across levels (7-9) in the HSK 3.0 word list.