transcription, транскрипция: [ ɪkstri:mli ]
Frequency: The word is one of the 1500 most common words in English.
You use extremely in front of adjectives and adverbs to emphasize that the specified quality is present to a very great degree.
These headaches are extremely common...
Three of them are working extremely well.
= exceedingly, very
ADV : ADV adj / adv [ emphasis ]