Difficult to accept; unpalatable.
Difficult or impossible to digest.
Anything that is difficult to digest.
Obstinate.
Firm; resolute; dauntless.
Materially strong, enduring.
Large; bulky.
To persist, endure.
Gadfly.
Gnat.
A large clothing size.
A dark and strong malt brew made with toasted grain.
An obese person.
Firefly or miller (moth).