foggier
adj. 有霧的( foggy的比較級 ); 霧氣朦朧的; 模糊的; 混亂的
When it is foggy, there is fog.
It's quite foggy now...
現在霧很大。
Conditions were damp and foggy after morning sleet.
早上的雨夾雪過後天氣潮溼多霧。
If you say that you haven't the foggiest or you haven't the foggiest idea, you are emphasizing that you do not know something.
I did not have the foggiest idea what he meant...
我根本不知道他是什麼意思。
'How often does it need to be changed?' — 'Haven't the foggiest.'
“大概要多久換一次呢?”——“我一點兒概念也沒有。”