Definition of ownest in US English:

ownest

noun

informal
  • After a possessive: (as a term of endearment) one's darling, one's sweetheart.

Origin

Mid 19th century; earliest use found in Nathaniel Hawthorne (1804–1864), author. From ownest, superlative of own.

Pronunciation

ownest

/ˈʌʊnɪst/