unmotivated

From un- +‎ motivated.

unmotivated (comparative more unmotivated, superlative most unmotivated)

2. Lacking motivation, without impetus to strive or excel.

   Antonyms: motivated, remotivated

   Hyponym: demotivated

   • 2019 September 9, Kathryn Vasel, “Burnout is a big deal. Here’s how managers can spot it”, in CNN Business‎^[1]:

     When a typically chatty employee who often participates in meetings and is engaged and enthusiastic suddenly becomes unmotivated and quieter, that person could be at risk for burnout.

4. For which there is no motive, or no apparent rational motive.

   Near-synonym: unprovoked

   an unmotivated murder

   • 2025, Cid Swanenvleugel, The Pre-Roman Elements of the Sardinian Lexicon, page 41:

     An inherited etymology should not involve too many unmotivated irrregular sound changes aor ^[sic] non-trivial semantic shifts.