to make the low, interrupted noise that a chicken makes

to express disapproval or other emotion by making a short, sharp sound with your tongue

to cluck in disapproval/amazement 发出不满的／惊异的啧啧声

She shakes her head, smiles, and clucks her tongue. 她摇摇头，笑了笑，咂咂舌。

to express an unnecessary amount of sympathy, worry, or approval towards someone

The attendants clucked and fussed over passengers. 乘务员对乘客咋咋呼呼、大惊小怪。