Any adjective that is not gradable.
That cannot be graded.
(of an adjective) Describing a quality that cannot normally be varied because it is extreme (e.g. freezing), absolute (e.g. dead), or classification (e.g. nuclear).
Something that is simultaneously familiar and strange, typically leading to feelings of discomfort.
Strange, and mysteriously unsettling (as if supernatural); weird.
Careless.