ado, adieu

Ado or ado means fuss, confusion, or bustle--
His favorite play is "Much Ado About Nothing".
Without further ado...

Adieu or adieu is French, often used in English speech or writing,  for "farewell" or "good-bye"--
"So long, farewell, auf wiedersehen, adieu..."
"Adieu, adieu. Hamlet, remember me!"

Now that you know that, you can say--
"They just want to say "adieu" quietly, with as little ado as possible."

Note--"add you" ( two words, rhymes with adieu ) means to include ( add ) the person being addressed ( you )--
Can I add you to our list of volunteers?
Note # 2--"a do" ( two words, rhymes with ado ) means one ( a ) party or affair ( do )--
They are having a do on Friday; are you going?
"A do" might also mean one ( a ) hairstyle ( do )--
She wants the stylist to giver her a do like the one in the magazine.