Definition of agreeability in English:

agreeability

noun

archaic
  • The quality of being agreeable; especially agreeableness of disposition, pleasantness.

Origin

Late Middle English; earliest use found in Geoffrey Chaucer (c1340–1400), poet and administrator. Originally (in early use) from Middle French agréableté from agréable + -te.

Pronunciation

agreeability

/əˌɡriːəˈbɪlɪti/