Brumoso vs. neblinoso vs. nebuloso
The Spanish words brumoso, neblinoso, and nebuloso all refer to visual conditions that feature fog or mist, but they each emphasize slightly different elements or situations. Each word provides a different nuance when describing foggy or hazy conditions.
Brumoso
B1The Spanish word brumoso often refers to foggy or misty weather, particularly that which can't be easily seen through.
El camino estaba brumoso al amanecer.
(The road was foggy at dawn.)
La vista a través del cristal brumoso era tenue.
(The view through the foggy glass was dim.)
Neblinoso
A2Neblinoso is used more generally to describe foggy or misty weather; it does not necessarily imply that visibility is significantly impaired, simply that there's a level of haze in the atmosphere.
Salí a dar un paseo en la mañana neblinosa.
(I went for a walk on the misty morning.)
El lago parecía misterioso bajo el cielo neblinoso.
(The lake looked mysterious under the misty sky.)
Nebuloso
B2Nebuloso usually refers to clouds, both in the sense of atmospheric clouds and metaphorically to anything cloud-like or nebulous. Can potentially carry connotations of ambiguity or obscurity.
El horizonte se veía nebuloso desde la montaña.
(The horizon looked cloudy from the mountain.)
El futuro parece un poco nebuloso en este momento.
(The future seems a bit nebulous at this moment.)
Summary
While brumoso, neblinoso, and nebuloso all indicate foggy or misty conditions, brumoso often implies impaired visibility, 'neblinoso’ is used fuzzily for general hazy situations, and nebuloso is more aligned with cloudiness and possibly metaphorical ambiguity.