El libro es muy pesado.

to be

Breakdown of El libro es muy pesado.

• el libro: the book
• muy: very
• pesado: heavy

Questions & Answers about El libro es muy pesado.

Why does the sentence use ser (“es”) and not estar (“está”)?

In Spanish, ser describes inherent or permanent characteristics, while estar is for temporary states or locations. Weight is seen as an inherent property of an object, so you say El libro es muy pesado. You’d only use estar if you meant it had become heavy under unusual circumstances (e.g., “El libro está más pesado hoy” would sound odd anyway; you’d normally stick with ser).

Why is muy placed before pesado?

Muy is an adverb of degree (very) and in Spanish it comes directly before the adjective it modifies. So you say muy pesado, not pesado muy.

Does pesado change form for gender and number?

Yes. As an adjective, pesado agrees with the noun:

• Masculine singular: pesado (el libro pesado)
• Feminine singular: pesada (la caja pesada)
• Masculine plural: pesados (los libros pesados)
• Feminine plural: pesadas (las cajas pesadas)

Can pesado have non-literal meanings?

Absolutely. Besides “heavy,” pesado can mean “boring” or “tedious” when referring to a person or activity (Eres muy pesado = You’re so annoying/bordensome). Context tells you if it’s literal weight or a figurative sense.