Tired describes Sherika, so "tired" is an adjective.
It's used as a predicate adjective here.
In the sentence "Shenika looks tired," the word "tired" functions as an adjective. It describes the state or condition of Shenika. To determine the part of speech of a specific word, you can look at its role and function within the sentence. In this case, "tired" is describing the appearance of Shenika, which indicates it is an adjective.
