Learn Hardcore Spanish (Latin America): El bosque es bello.

Because bosque is a masculine singular noun in Spanish. The definite article for masculine singular nouns is el, so el bosque means “the forest.”

Why is the verb es used here and not está?

Spanish has two verbs for “to be”: ser and estar. Es is the third-person singular present of ser, used for inherent or permanent qualities. Beauty is considered an essential trait, so you say es bello. Estar (e.g. está bello) would imply a temporary state or location, which doesn’t fit “being beautiful.”

What does bello mean, and what part of speech is it?

Bello is an adjective meaning “beautiful.” It describes a noun’s quality. Like other adjectives in Spanish, it agrees in gender and number: bello, bella, bellos, bellas.

How is bello different from hermoso or bonito?

All three mean “beautiful” or “pretty,” but with style nuances:
• Bonito: Very common, informal (cute, nice).
• Hermoso: Slightly more elevated than bonito, but still common.
• Bello: More literary or poetic; you’ll see it in writing, speeches, or descriptive language.

Why does the adjective come after the noun here? Could I say el bello bosque?

The default adjective position in Spanish is after the noun: bosque bello. However, placing it before (el bello bosque) is also correct; it adds a poetic or emphatic tone. In everyday speech you’re more likely to hear “este bosque es bello” than “el bello bosque.”

How would I make this sentence plural to say “The forests are beautiful”?

You need to pluralize the article, noun, verb, and adjective:
Los (plural of el)
bosques (plural of bosque)
son (third-person plural of ser)
bellos (plural masculine of bello)
So you get: Los bosques son bellos.

How do you pronounce bosque?

Break it into two syllables: bos-que. The qu before e makes a /k/ sound. It’s pronounced [ˈbos.ke], with the stress on the first syllable.

If I wanted to say “A forest is beautiful,” what would I change?

Switch the definite article el to the indefinite un:
Un bosque es bello.
This means “A forest is beautiful.” If you wanted “Forests are beautiful,” use Los bosques son bellos (as above).