It's time for a new Wednesday Wordplay challenge here at the mentalfloss.com Brain Game. Good luck!

ONE of the four words in the following list is misspelled. Identify the culprit:

IMAGINARY
INCIDENTALLY
INDISPENSIBLE
IRRELEVANT

Here is the ANSWER.

THE ANSWER:

The misspelled word is INDISPENSIBLE.

The proper spelling is INDISPENSABLE.

Thanks for playing!