Jumentous

Jumentous: Pronounced /dʒuːˈmɛntəs/: Smelling distinctly like horse urine.

Why someone saw fit to create a word that specifically identified horse urine when even humans don't have that consideration remains a mystery. It's also a rather tricky word because it sounds positive and glorious. Imagine being told that you are jumentous (but not knowing the meaning). You would walk away confident that you have an admirer of some sort.

Blesiloquent

Blesiloquent: To speak with a stutter or a lisp

Was it just a cruel twist of fate that this word would be a challenge to pronounce for those who have a lisp or a stutter?

Bever

Bever (noun): A snack between meals.

"The problem with bevers is that they end up containing more calories than meals."

Jiffle

Jiffle (verb): To fidget or shuffle restlessly

An easy word to remember because it sounds like a combination of the words "fidget" and shuffle."

Bumbledom

Bumbledom (noun): The petty actions and mannerisms of pompous but inefficient government officials.

Easy to remember because it's not difficult to envision bumbling fools where you hear this word -- making it a nice noun option to a common adjective.

Balbutiate

Balbutiate (verb): To stammer or stutter

And yet, try saying this word quickly, over and over, and try not to stutter or stammer.

Aprosexia

Aprosexia (noun): Medical term describing an almost complete inability to focus or sustain attention.

This word is notable for the fact that it is the most boring term to contain the word "sex."