The word "extremely" is an adverb that is used to indicate a high degree or intensity of something. It is often employed to emphasize how significant, strong, or intense something is. For example, if you say "She is extremely talented," you are emphasizing that her talent is beyond the usual level.
The word "extremely" is derived from the Latin word "extremus," meaning "outermost" or "utmost." The prefix "ex-" suggests "out of" or "from," while the suffix "-ly" indicates it is an adverb. The term has evolved in English to mean "to the highest degree."