She minces across the hall in her high heels, trying to appear elegant.

minces 是动词 mince 的第三人称单数形式。mince 本意是"切碎、剁碎"，引申为"用小而快的步子走路"，常用来形容穿着高跟鞋或刻意保持优雅姿态时的走路方式。