Main entry: incompatible, antagonistic
Definition: used especially of drugs or muscles that counteract or neutralize each other's effect
Antonyms: synergistic, interactive
Definition: used especially of drugs or muscles that work together so the total effect is greater than the sum of the two (or more)
Main entry: antagonistic
Definition: arousing animosity or hostility
Usage: his antagonistic brusqueness; Europe was antagonistic to the Unites States
Antonyms: conciliative, conciliatory
Definition: intended to placate
Main entry: antagonistic, counter
Definition: indicating opposition or resistance
Antonyms: affirmative
Definition: a reply of affirmation
Antonyms: affirmative, affirmatory
Definition: affirming or giving assent
Antonyms: positive
Definition: characterized by or displaying affirmation or acceptance or certainty etc.
Antonyms: neutral
Definition: possessing no distinctive quality or characteristics
Antonyms: positive
Definition: reckoned, situated or tending in the direction which naturally or arbitrarily is taken to indicate increase or progress or onward motion
Antonyms: positive, confirming
Definition: indicating existence or presence of a suspected condition or pathogen
Main entry: antagonistic, antipathetic, antipathetical
Definition: characterized by antagonism or antipathy
Usage: slaves antagonistic to their masters; antipathetic factions within the party
Antonyms: friendly
Definition: troops belonging to or allied with your own military forces
Antonyms: friendly
Definition: of or belonging to your own country's forces or those of an ally
Antonyms: amicable
Definition: characterized by friendship and good will
Main entry: antagonistic
Definition: incapable of harmonious association
Antonyms: compatible
Definition: able to exist and perform in harmonious or agreeable combination
Antonyms: compatible
Definition: capable of being used with or connected to other devices or components without modification