This is the 64th most frequent Spanish word.
mucho
"Mucho" means "a lot" or "much" in English.
Here, 'muchos' is an adjective agreeing in gender and number with the noun 'libros,' meaning 'many.'
Tengo muchos libros en mi biblioteca.
I have many books in my library.
'Mucho' functions as an adverb to intensify the verb phrase 'Te quiero,' expressing a high intensity of feeling.
Te quiero mucho.
I love you very much.
In this sentence, 'mucho' is used as an adverb to modify the verb 'trabajo,' indicating a high frequency or intensity of the action.