English Dictionary

Not certain; not having certain knowledge; not assured in mind; distrustful.
Source : opted (164924)  - auto

Irresolute; inconsonant; variable; untrustworthy; as, an uncertain person; an uncertain breeze.
Source : opted (164925)  - auto

Questionable; equivocal; indefinite; problematical.
Source : opted (164926)  - auto

Not sure; liable to fall or err; fallible.
Source : opted (164927)  - auto

To make uncertain.
Source : opted (164928)  - auto