The Double Vocabulary of English

Style, again.

As mentioned earlier, English has parallel vocabularies, based on the origin of the root words, such as the Germanic "drink" and the "Norman beverage".  In gross terms, the Germanic version is more forceful and everyday, the French more sophisticated, and the Latin and Greek more scholarly. (There are exceptions. This is English we're talking about. There's always an exception.)

Here's a video explaining more about these parallel tracks.