doubtful

feeling a high degree of uncertainty

feeling a very high degree of uncertainty

feeling a small degree of uncertainty

feeling a small degree of uncertainty

feeling a moderate degree of uncertainty

considered to be unlikely

considered to be very unlikely; a common and strong collocation

considered to be very unlikely

considered to be slightly unlikely

considered to be slightly unlikely

becoming more and more unlikely over time

considered to be moderately unlikely

specifies the subject of the doubt

to express a state of uncertainty

to give the impression of being uncertain

to appear uncertain based on facial expression

to personally experience uncertainty

to convey uncertainty through speech

to continue to feel uncertain

to start feeling uncertain about something

to be considered unlikely

to give the impression of being unlikely

to appear to be unlikely

to continue to be considered unlikely