(of a statement or story) unlikely to be authentic, even though it is widely believed to be true

비기록의, 가짜의
a feeling of uncertainty and doubt about something
open to question and disagreement

논쟁의 여지가 있는, 주장할 수 있는
used to express one's uncertainty about the statement one has made as there might be something that makes it untrue
to certainly happen at some point in the future
a state of being confused and not having a clear understanding of an action, behavior, etc.

혼란, 혼동
subject to argument or disagreement

논란의 여지가 있는, 논쟁의 소지가 있는
a feeling of disbelief or uncertainty about something

의심, 불확실성
to not believe or trust in something's truth or accuracy

의심하다, 신뢰하지 않다
improbable or unlikely to happen or be the case

의심스러운, 미심쩍은
(of a person) unsure or hesitant about the credibility or goodness of something

의심스러운, 불확실한
acting or talking with hesitation due to uncertainty or lack of confidence

우물우물한 (umulumulhan), 주저하는 (jujeohaneun)
(of speech or movement) in a nervous manner that makes one stutter while speaking or stumble while walking

더듬거리며, 주저하며
to say that one will do something even though they might not really intending to
to pause before saying or doing something because of uncertainty or nervousness

망설이다, 주저하다
having a feeling of uncertainty or doubt toward something

미심쩍은, 불확실한
not able to occur, exist, or be done

불가능한, 해낼 수 없는
used to show uncertainty or hesitation

어쩌면, 아마도
used usually in a response to show that something may not be true
used to show one's uncertainty of something
