What's the last show of a television season?
season FINale
What's the last, comprehensive test you take at the end of the year?
FINal exam
What do you say when you've completed a task?
I'm FINished!
What do you see at the end of old-fashioned movies?
FIN
What are French and Spanish words for "the end"?
FIN, FINito
What's a term for limiting something?
conFINe
What is the word for limiting an idea, say, the number of people you can fit in a phone booth?
FINite
What is the word when you set a limit or explanation to something?
deFINe
What is the noun version of a limit or explanation for something?
deFINITE
How about the adverb version?
deFINITEly
What does the root "FIN" mean?
An end or limit!
There are NO 'A's in the words define, definite, or definitely! No A! None, whatsoever! ZERO A!
Look! Now you know how to spell! Latin is your friend! So is etymology in general!
(PS, for word nerds like me: "finite" and "definite" are from different but still-related Latin root words definire and finire, so the "de" is NOT a negative prefix in this case. )