heavy fog; dense fog; thick fog
totally at a loss; lose one's bearings; in a maze; in a fog; all at sea; up in the air
sprayer; vaporizer; vaporiser; atomizer; atomiser
rime; hoarfrost; silver frost
Musha Incident (Taiwan; 1930); Wushe Uprising
(many things) gathering like clouds and vanishing like mist; swarming and scattering