What's the difference between plaguily and plaguy?

Plaguily

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Definition:

• (adv.) In a plaguing manner; vexatiously; extremely.

Example Sentences:

Plaguy

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Definition:

• (a.) Vexatious; troublesome; tormenting; as, a plaguy horse. [Colloq.] Also used adverbially; as, "He is so plaguy proud."

Example Sentences: