Let's look at an English example first ...
CART is a "ghost" of CARROTS .. and so is ROT and CARS and COTS
They are what's left when some of the letters of a word have blown away.
Now a French one ...
REX is a "ghost" of "MERVEILLEUX" MERVEILLEUX
and so are ILL , ME , MILE , EVE, EVIL, VEX .....
But now, here's some for you to do ....
I show you the ghost, and your job is to find the original French word......
[1] Find a French word whose ghost is PRO.
[2] The next one's ghost is ...... ONE
[3] LENT
[4] US
[5] NIL
[6] TAR
[7] LONE
[8] SUM
[9] ALL
[10] AMEN
An added bit of gripping-ness ....those "ghosts" will most likely be the ghosts of lots of other French words as well ... so "your" answers will still be right.
And now, the music .....