Prefix (उपसर्ग) anti- की उत्पत्ति ग्रीक शब्द से हुई है जिसका अर्थ against (विरुद्ध) या opposite (विपरीत) होता है। जैसे -
anti → opposite/ against
Antidote → remedy given ‘against’ a poison (विष नाशक)
antithesis → exact opposite (विपरीत)
antipathy → a feeling of intense dislike (सहज-विरोधी)
Antibiotic → drug given ‘against’ the life-form bacteria which has invaded a body (प्रतिजैविक)
Antifreeze → a liquid used ‘against’ the freezing of cars’ engines (हिमनिरोधी)
Antisocial → of going ‘against’ being social (असामाजिक)
anticlimax → a disappointing decline after a previous rise (दुखान्त)
antiseptic → thoroughly clean and free of disease-causing organisms (रोगाणु रोधक)
antihero → a protagonist who does not act brave or morally good (एन्टीहिरो)
anti-inflammatory → a medicine intended to reduce swelling (प्रज्वलनरोधी)