For the longest time I thought this word had the exact opposite meaning - an abundance, plenty. This resulted in me meaning the opposite of what I said whenever I used the term.

Hilarity ensued when I would compliment the host on the dearth of cute boys at the party, etc...

To this day, when I hear "dearth" I picture a chest or coffer overflowing with stuff.

Did I mention I'm profoundly dyslexic?