This is the 692nd most frequent Spanish word.
demasiado
"Demasiado" means "too much" or "too many" in English.
In this sentence, 'demasiado' is used as an adverb modifying the adjective 'cansado,' indicating an excessive degree of tiredness.
Estoy demasiado cansado para salir esta noche.
I am too tired to go out tonight.
Here, 'demasiados' works as an adjective because it modifies the noun 'libros,' conveying a quantity that exceeds what is reasonable or expected.
Hay demasiados libros en la mesa para caber en la mochila.
There are too many books on the table to fit in the backpack.
In this context, 'demasiado' functions as an adverb modifying the verb 'habla,' expressing an excessive action or degree of speaking.