How to Say "garb" in Spanish
The Spanish word for “garb” is “atuendo” — B2 level.

Examples
Su atuendo para la boda era elegante y sofisticado.
Her attire for the wedding was elegant and sophisticated.
El atuendo tradicional de esta región incluye faldas coloridas.
The traditional outfit of this region includes colorful skirts.
Los caballeros vestían un atuendo de gala para la ceremonia.
The gentlemen wore formal gala attire for the ceremony.
It's a 'Package Deal'
Unlike 'ropa' (clothes), which can be general, 'atuendo' usually refers to the entire look or a specific complete set of clothing chosen for a purpose.
Always Masculine
Even if a woman is wearing the clothes, the word is always 'el atuendo'. The gender of the noun doesn't change based on who is wearing the outfit.
Overusing it in Casual Settings
Mistake: “Using 'atuendo' to talk about your pajamas or gym clothes with friends.”
Correction: Use 'ropa' for everyday talk. Say 'Me gusta tu ropa' instead of 'Me gusta tu atuendo' unless you want to sound like a fashion critic.
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