The word Mexican is a proper noun. All proper nouns should be capitalised.
Jicama is a noun. Jicama is a large, Mexican, root vegetable.
only part Mexican
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The name of Miguel Hidalgo's speech is Mexican Independence. The cry of dolores!
All of Mexico was part of the Mexican Revolution.
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech for "unfamiliar" is an adjective.