1. 非功能的：nonfreezing window washer solvent;耐寒的窗用洗涤剂 | nonfunctional;非功能的 | nonfunctional knob;非功能按钮
adj
1. not having or performing a function
2. not performing or able to perform its regular function
e.g. a malfunctioning valve
Synonym: malfunctioning