The stove was red hot.火炉是炽热的。
His face was bright red.他的脸是鲜红的。
The weather is freezing [icy, bitter] cold.天气冷极了。
其中的red, boiling, freezing, icy, bitter等的实际意义大致相当于very,起加强语气的作用,并且它们用法也很有限,如可说bitter cold(冰冷),bitter wind(寒风)等,习惯上却不说bitter hot(炽热),bitter busy(极忙)等。