adversarial

English

Etymology

Probably from adversary +‎ -al

Pronunciation

• (Received Pronunciation) IPA^(key): /ˌæd.vəˈsɛə.ɹi.əl/

• Audio:

  (file)

• (General American) IPA^(key): /ˌæd.vɚˈsɛɚ.i.əl/
• (Australia) IPA^(key): /ˌæd.vəˈseː.ɹi.əl/

Adjective

adversarial (comparative more adversarial, superlative most adversarial)

1. Characteristic of, or in the manner of, an adversary; combative, hostile, opposed.
   • 2012 November 7, Matt Bai, “Winning a Second Term, Obama Will Confront Familiar Headwinds”, in The New York Times‎^[1], New York, N.Y.: The New York Times Company, →ISSN, →OCLC, archived from the original on 6 November 2025:

     In polling by the Pew Research Center in November 2008, fully half the respondents thought the two parties would cooperate more in the coming year, versus only 36 percent who thought the climate would grow more adversarial.

   • 2021 June 2, “Network News: Simplification, not nationalisation”, in RAIL, number 932, page 9:

     The White Paper therefore aims to tackle complexity rather then ownership of the railways, and to eliminate "the adversarial relationships between operators, suppliers, NR and government".

2. (law) In which issues are tried through the presentation of evidence and argument by adverse parties, with no or limited inquiry by the court's own initiative.

   Canada uses an adversarial system of criminal justice, whereas France uses an inquisitorial model.

Antonyms

• cooperative

Derived terms

• adversarial collaboration
• adversariality
• adversarially
• adversarialness
• adversarial stylometry
• adversarial system
• generative adversarial network
• nonadversarial
• unadversarial

Translations

characteristic of, or in the manner of, an adversary

• Arabic: عدائي
• Chinese:

  Mandarin: 敵對的 / 敌对的 (díduì de), 對抗的 / 对抗的 (duìkàng de)

• Dutch: vijandig (nl)
• Finnish: vihamielinen (fi)
• German: feindlich (de), gegnerisch (de), konfliktreich (de), konfliktär (de), auf Gegensätzen beruhend, kontradiktorisch (de)
• Spanish: adverso (es)

Spanish

Etymology

Etymology tree

Proto-Indo-European *h₂éd

Proto-Italic *ad

Proto-Italic *ad-

Latin ad-

Proto-Indo-European *wert-

Proto-Indo-European *-eti

Proto-Indo-European *-etor

Proto-Indo-European *wértetor

Proto-Italic *wertō

Latin vertō

Latin advertō

Latin adversus

Proto-Indo-European *-eh₂

Proto-Indo-European *-os?

Proto-Indo-European *-o-

Proto-Indo-European *-so-

Proto-Indo-European *-eh₂so-

Proto-Indo-European *-yós

Proto-Indo-European *-eh₂s(i)yós

Proto-Italic *-āsijos

Proto-Italic *-āsios

Latin -ārius

Latin adversāriuslbor.

Spanish adversario

Proto-Indo-European *h₂el-

Proto-Indo-European *-is

Proto-Indo-European *h₂élisder.?

Proto-Italic *-ālis

Latin -ālis

Spanish -al

Spanish adversarial

From adversario + -al.

Pronunciation

• IPA^(key): /adbeɾsaˈɾjal/ [að̞.β̞eɾ.saˈɾjal]
• Rhymes: -al
• Syllabification: ad‧ver‧sa‧rial

Adjective

adversarial m or f (masculine and feminine plural adversariales)

1. (law) adversarial