Main entry: unreactive
Definition: (chemistry) not reacting chemically
Antonyms: reactive
Definition: participating readily in reactions
Antonyms: unstable
Definition: lacking stability or fixity or firmness
Antonyms: ignoble
Definition: completely lacking nobility in character or quality or purpose
Antonyms: lowborn
Definition: of humble birth or origins
Antonyms: negative
Definition: characterized by or displaying negation or denial or opposition or resistance; having no positive features
Antonyms: positive
Definition: characterized by or displaying affirmation or acceptance or certainty etc.
Antonyms: active
Definition: characterized by energetic activity
Antonyms: active
Definition: engaged in full-time work
Antonyms: active
Definition: full of activity or engaged in continuous activity
Antonyms: active
Definition: tending to become more severe or wider in scope
Antonyms: active
Definition: exerting influence or producing a change or effect
Main entry: unreactive
Definition: not tending to react to stimulation
Antonyms: sensitive
Definition: responsive to physical stimuli
Antonyms: sensitive
Definition: being susceptible to the attitudes, feelings, or circumstances of others