Immigrate is a verb.
Lots of Slovaks migrate to the US in 1900-1920. They immigrate because Slovak was a part of Austrian-Hungarian Empire where was economic crisis.
the island of La Réunion is part of France. The conditions to immigrate are the same as those to get in mainland France.
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 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.
The part of speech of "came" is a verb.
The part of speech for "lecturer" is a noun.