Not settled, uncertain, of uncertain outcome; debatable, questionable, open to doubt.
Difficult to overcome, solve, or decide.
Contributing (especially if subtly) to discrimination (such as racism, sexism, homophobia, transphobia, or ageism).
a problematic analysis
A problem or difficulty in a particular field of study.
Determined; unyielding.
Highly stimulating to the senses.
Having an offensive or intense odor or flavor.
Having a high concentration of an essential or active ingredient.
Having a specified number of people or units.
Severe; very bad or intense.
Having a wide range of logical consequences; widely applicable. (Often contrasted with a weak statement which it implies.)
Capable of producing great physical force.
Inflecting in a different manner than the one called weak, such as Germanic verbs which change vowels.
Having a high alcoholic content.
Not easily subdued or taken.
Having wealth or resources.
Impressive, good.
That completely ionizes into anions and cations in a solution.
Convincing.
Having a lot of power.
Capable of withstanding great physical force.
In a strong manner.