The e's have it

What word begins with an e and ends with an e and has one letter? envelope

I thought I would take advantage of a joke to fix the booboos we make.
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Incorrect: If worse comes to worse…
Correct: If worse comes to worst…
Incorrect: Do a 360.
Correct: Do a 180.
Incorrect: pawn off
Correct: palm off
Incorrect: Hone in.
Correct: Home in.

Also, the abbreviation we frequently use, e.g., derives from Latin, exempli gratia.