의심하는
Feeling uncertain, hesitant, or skeptical about something.
예문:
"She felt doubtful about accepting the job offer."
"The professor was doubtful of the student's explanation."
불확실한
Not certain or likely to happen; improbable.
예문:
"It is doubtful that the team will win the championship."
"The success of the mission remains doubtful."
수상쩍은
Of questionable character, honesty, or validity.
예문:
"The witness gave a doubtful account of the events."
"We should avoid investing in such doubtful ventures."