wài​gāng​nèi​róu

tough outside soft inside

  1. 外 wài locative
    outside
    outside; exterior; the space or position beyond a certain limit or boundary
  2. resolute
    firm or unyielding in character or temperament; upright
  3. 内 內 nèi locative
    inside
    inside; within; inner; internal; specifically refers to the interior or domestic domain as opposed to the exterior or foreign domain; often used in spatial or temporal contexts
  4. 柔 róu adjective
    gentle
    (bound form) gentle; mild; yielding