The word for ‘dirty’ in Spanish is ‘sucio’ when referring to masculine nouns, and ‘sucia’ for feminine nouns. For example, you might say ‘el plato está sucio’ (the plate is dirty) or ‘la camisa está sucia’ (the shirt is dirty).
In Spanish, adjectives must agree in gender and number with the nouns they describe. So, if you’re talking about a group of dirty objects or people, you would say ‘sucios’ for a masculine plural and ‘sucias’ for a feminine plural, like ‘los platos están sucios’ or ‘las camisas están sucias’.