The word example is a noun, a singular, common, abstract noun.
A word is a part of speech, not a sentence like the one in your example.
A suffix changes a word's part of speech. For example, the word 'happy' is an adjective. But when you add a suffix, which is an ending, it can change the part of speech. Happily is an adverb. Happiness is a noun.
"Embarrassing" is an adjective. Example: The embarrassing punch was removed from the table.
A contradictory part of speech refers to when a particular word is used in a way that contradicts its typical part of speech classification. For example, if a word is usually a noun but is used as a verb in a sentence, that would be contradictory.
The suffix affects a word's part of speech. For example, the word 'happy' is an adjective. When you change the suffix, it changes the part of speech. If you change 'happy' into 'happiness' it becomes a noun; when you change it into 'happily' it becomes an adverb.
The word "adhere" is part of the verb in a sentence. For example, "I adhere to the rules and regulations."
A dictionary will tell you the part of speech for each word. For example, the entry for "dictionary" will state noun.
submerge is a verb. example: the submarine is about to submerge
"Reappearance" is a noun. Other forms of the word are other parts of speech, however. "Reappear" is a verb, for example.
The word 'in' would be a preposition in the example sentence you gave.
A Demonstrative Adjective.
To is a preposition in that example.