inconsistent

Inconsistent describes something that's varied or irregular. So if you're supposed to floss every day, but you only remember every now and then, your commitment to oral hygiene could be called inconsistent.

The adjective inconsistent first came into use in the 1640’s, with the sense of “not agreeing in substance or form.” Broken down into its roots, in plus consistent, the word literally means "not consistent." Behavior, results in lab experiments, and your cooking skills could all be described as inconsistent if they are irregular, spotty, and hard to predict.

Definitions of inconsistent
1

adj displaying a lack of consistency

inconsistent statements cannot both be true at the same time”
inconsistent with the roadmap”
Synonyms:
at odds, conflicting, contradictory, self-contradictory
in disagreement
discrepant, incompatible
not compatible with other facts
scratchy, spotty, uneven
lacking consistency
unconformable
not correspondent
unreconciled
not made consistent or compatible
variable
liable to or capable of change
Antonyms:
consistent
(sometimes followed by `with') in agreement or consistent or reliable
accordant, agreeable, concordant, conformable, consonant
in keeping
pursuant
(followed by `to') in conformance to or agreement with
reconciled
made compatible or consistent
self-consistent
not self-contradictory
unchanging
conforming to the same principles or course of action over time
invariable
not liable to or capable of change
show more antonyms...

adj not in agreement

Synonyms:
discrepant
incongruous
lacking in harmony or compatibility or appropriateness

adj not capable of being made consistent or harmonious

inconsistent accounts”
Synonyms:
irreconcilable, unreconcilable
impossible to reconcile

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