Also means
many
Usage Note
Mucho functions as an adverb when modifying a verb or adjective (trabaja mucho, mucho mejor), in which case it is invariable. As a determiner it agrees in gender and number: muchos libros, muchas personas. The shortened form muy ('very') is a separate word used only before adjectives and adverbs, never alone.
Examples
"Hay mucho tráfico esta mañana."
Natural Translation
There is a lot of traffic this morning.

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