Serious, grave, dire, or dangerous.
Causing grief, pain, or sorrow.
Of, relating to, or being the simplest possible case.
Commonplace, ordinary.
Pertaining to the trivium.
Ignorable; of little significance or value.
Relating to or designating the name of a species; specific as opposed to generic.
Self-evident.
Concerned with or involving trivia.
Indistinguishable in case of truth or falsity.