onlest

Only.

Adjective

  1. Only.
    • I'm the onlest father them boys has got.
    • I knowed the onlest thing to get her cured was to get a bucket of ice water, […] - c. 1850-1970, Scott Dunbar, quoted in 2009 by William R. Ferris in Give My Poor Heart Ease: Voices of the Mississippi Blues →ISBN

Origin

Variant of onliest.