svwayed gently

 The charwoman stood in the doorway with a smile on her face as if she had some tremendous good news to report, but would only do it if she was clearly asked to. The almost vertical little ostrich feather on her hat, which had been a source of irritation to Mr. Samsa all the time she had been working for them, swayed gently in all directions. 

(Kafka: Metamorphosis)