1. 不合时的：democratize 民主化 | demode 不合时的 | demoded 过时的

2. 解码：democraticsupervision民主监督 | demode解码 | demodecticacariasis毛囊螨病

3. 检波器：DELAY:延时 | DEMODE:检波器 | DET:检测

adj

1. out of fashion

e.g. a suit of rather antique appearance
demode (or outmoded) attire
outmoded ideas

Synonym: antiqueexold-fashionedold-hat(p)outmodedpassepassee