Lack of trust or confidence; distrust, untrust.
To be suspicious.
To have no confidence in (something or someone).
To be wary, suspicious or doubtful of (something or someone).
To suspect, to imagine or suppose (something) to be the case.
The practice or philosophy of being a skeptic.
Doubt or disbelief of religious doctrines
The doctrine that absolute knowledge is not possible
A studied attitude of questioning and doubt
A methodology that starts from a neutral standpoint and aims to acquire certainty though scientific or logical observation.