Having been determined but not specified.
Unfailing; infallible.
Known but not specifically named; indeterminate; indefinite; one or some; sometimes used independently as a noun, and meaning certain persons; see also "one".
Fixed or stated; regular; determinate.
Not to be doubted or denied; established as a fact.
Sure, positive, not doubting.
Actually existing; sure to happen; inevitable.
Unnamed or undescribed members (of).
Unsure of one's sexual orientation and/or gender identity.
Characterized by questions, inquisitiveness, doubt, or wonder.
Interrogation.
The action of asking questions; a survey; an inquiry.
The act of challenging, wondering, and doubting.