re-designation letter
There are many 3 letter words ending in "re". a r e is are, which ends in re, and is a 3 letter word. there are many others.
The term re usually is an abbreviation for the word regarding.
After. Dear Fred, Re: your last letter...
bicolor
The Revolver
Its a letter in the alphabet
On a Letter it usually means 'regards' In an email letter it usually means 'reply'
redot
genre
re
failure