unreliably

In unpredictable fashion

Unreliably describes doing something in a way that cannot be depended upon or trusted to be consistent.

If a machine works unreliably, it sometimes functions and sometimes doesn't.

A person who unreliably shows up for appointments may come on time, arrive late, or not appear at all.

The old car started unreliably in cold weather.

The adverb contrasts with reliably, which suggests dependable, predictable performance.

uncertainty

doubtfully

In an unconvinced way

tentatively · ambiguously · vaguely · indefinitely · indeterminately · incalculably

inconsistency

erratic

Lacking regularity or consistency

irregular · variable · uneven · patchy · hit-or-miss · spotty · fitful · haphazard · capricious · fickle

risk

precariously

In risky unstable manner

perilously · insecurely · unstably · shakily · tenuously · vulnerably

untrustworthiness

undependable

Not consistently trustworthy

questionable · sketchy · dodgy · shady · flaky · treacherous · faithless · disloyal · deceitful · dishonest

Opposites
consistency/dependability

unreliablyreliably

In dependable manner

dependably · consistently · steadily · unfailingly · without fail

faithfulness/loyalty

unreliablyfaithfully

With unwavering loyalty

loyally · devotedly · steadfastly · dutifully · truly

accuracy/precision

unreliablyaccurately

In a correct manner

precisely · trustworthily · validly · soundly · credibly

Phrases
Family

unreliable, unreliability

Familiarity
Top 200,000
Profile
Known to kids · Used worldwide · Timeless · Abstract · Negative · Everyday, not technical · Rated G