SWELLHEAD

PRONUNCIATION: (SWEL-hed)

MEANING: noun: A vain, conceited person.

ETYMOLOGY: Alluding to a person’s having a high opinion of themselves, as having a big swelled head. From swell, from Old English swellan + head, from Old English heafod (top of the body). Earliest documented use: 1845.
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SWELLHEAR - what happens when you the organ pedal press

WELLHEAD - where the oil comes out of the ground

SWELL-HEX-AD - Weasleys' Joke Shop has a great promotion for their new jinx in both the Quibbler and the Daily Prophet