nut in Catalan

(food, broadly) Any of various hard-shelled seeds or hard, dry fruits from various families of plants.

(hardware) A piece of hardware, typically metal and typically hexagonal or square in shape, with a hole through it having internal screw threads, intended to be screwed onto a threaded bolt or other threaded shaft.

(vulgar, slang, chiefly plural) A testicle, often used in the plural form.