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"Aburrido" is a form of "aburrido", an adjective which is often translated as "boring". "Estoy muy cansado" is a phrase which is often translated as "I'm very tired". Learn more about the difference between "estoy muy cansado" and "aburrido" below.
estoy muy cansado()
A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
a. I'm very tired
Estoy muy cansado. Me pasé el día trabajando.I'm very tired. I've been working all day.
aburrido()
An adjective is a word that describes a noun (e.g., the big dog).