D defs.my
Entry 1 sense Webster, 1913

Treatable

/trēt'-əb-əl/ · Treat·a·ble · IPA /trˈiːtəbəl/
01 a. Manageable; tractable; hence, moderate; not violent.
  1. 1.
    Manageable; tractable; hence, moderate; not violent.[Obs.]
    “A kind of treatable dissolution.” Hooker.
    “The heats or the colds of seasons are less treatable than with us.” Sir W. Temple.