gesundheit.
I've been doing some crossword puzzles recently, and etui shows up as a "needle case."
Recently, I emptied a box of 0.5 mm pencil leads and thought this would make a great thing to hold a few needles for portable use. Works great.
(https://forum.upholster.com/proxy.php?request=http%3A%2F%2Fs7d1.scene7.com%2Fis%2Fimage%2Fofficedepot%2F929364_sk_lg%3F%24OD%252DLarge%24&hash=5124c899552d8fda32d4ea197eef4758)
I did crosswords for over 20 years until I switched to the E-edition a couple of years ago.
Words like etui, anon, and ulee (Ulee's Gold) were always popular "filler"words. They also liked to work in the architect, I.M. Pei.