unstimulated

Etymology tree
Proto-Indo-European *né
Proto-Indo-European *n̥-
Proto-Germanic *un-
Proto-West Germanic *un-
Old English un-
Middle English un-
English un-
Proto-Indo-European *(s)tey-?
Latin stimulus
Latin stimulo
Latin stimulatusbor.
English stimulate
Proto-Germanic *-ōd-
Old English -ode
Middle English -ede
English -ed
English stimulated
English unstimulated
From un- + stimulated.