Definition of adversariness in English:

adversariness

noun

  • The fact of being an adversary; adversarial function; opposition, antagonism, enmity.

Origin

Late 19th century (in an earlier sense). From adversary + -ness.

Pronunciation:

adversariness

/ədˈvəːs(ə)rɪnɪs//ˈadvəs(ə)rɪnɪs/