dense fog; thick mist
Rare literary term for a heavy, obscuring fog or mist. Not used in everyday conversation; modern Japanese prefers 濃霧 (のうむ) or 深い霧.
In classical literature, scenes where 'dense fog' rolls in are sometimes depicted.
feeling depressed; gloominess
Rare figurative use, likening a depressed mood to being enveloped in thick fog. Extremely uncommon; modern Japanese uses 憂鬱 (ゆううつ) or 気分が沈む.
In an old essay, the expression 'a dense fog settles over the heart' can be found.
Rare kanji spelling using 濛 (obscure, misty). The character 濛 is not in the Jōyō kanji list.
Alternate rare kanji spelling using 朦 (dim, hazy). Also non-Jōyō.
Compound of 濛 (もう, 'misty, obscure') or 朦 (もう, 'dim, hazy') and 気 (き, 'air, atmosphere, feeling'). The exact origin is uncertain; it is a rare Sino-Japanese word.