Identify the word that is used incorrectly: "It seem like the sun never shines on Saturday."

The word "seem" is used incorrectly in the sentence due to subject-verb agreement. The subject "It" is a singular pronoun, while "seem" is the plural form of the verb. In this context, the correct verb form should be "seems" to match the singular subject. Thus, the correct sentence would read, "It seems like the sun never shines on Saturday." Adhering to proper subject-verb agreement is essential in maintaining grammatical accuracy in English sentences.