If you took all the lacunae in my personal knowledge and put them in one big box, it would be big enough to fill a forty acre college.
Lacuna is your word of the day. It's not your average everyday word. Try to use it in a sentence that shows off the word's meaning?
I tried to fill the lacuna in his writing with my own imagined scenario.
Lacuna rhymes with Hakuna as in Hakuna matata (no worries); and is a word found, among other places, in anatomy---canaliculi link lacunae to each other and to blood supply.
(Another cheat, but I think I deserve some credit for reaching that far.)