How to Say "trees" in Spanish
The Spanish word for “trees” is “árboles” — A1 level. This is a very common word in everyday Spanish.

Examples
En otoño, los árboles pierden sus hojas.
In autumn, the trees lose their leaves.
Necesitamos plantar más árboles para limpiar el aire de la ciudad.
We need to plant more trees to clean the city's air.
El bosque estaba compuesto por árboles centenarios que ofrecían un paisaje majestuoso.
The forest was made up of centuries-old trees that offered a majestic landscape.
Plural Formation Rule
To make a singular noun ending in a consonant (like árbol) plural, you add '-es' to the end. That's why árbol becomes árboles.
Gender Check
Since the singular form el árbol is masculine (it uses 'el'), the plural form árboles must also be masculine (it uses 'los').
Missing the Accent Mark
Mistake: “Using 'arboles' (no accent).”
Correction: The correct form is 'árboles'. The accent mark is necessary because the stress falls on the third-to-last syllable, which always requires a written accent in Spanish.
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