unmotivated

adjectives

without motivation
unmotivated
antonym
motivated
is similar to
having no justifying cause or reason
"a senseless, causeless murder"; "a causeless war that never had an aim"; "an apparently arbitrary and reasonless change"
causeless, reasonless
is similar to
occurring without motivation or provocation
"motiveless malignity"; "unprovoked and dastardly attack"- F.D.Roosevelt
motiveless, unprovoked, wanton
see also
not deliberate
unintended