The difference between Impenetrable and Undefeatable

When used as adjectives, impenetrable means not penetrable, whereas undefeatable means not defeatable.


Undefeatable is also noun with the meaning: something that has an undefeatable quality.

check bellow for the other definitions of Impenetrable and Undefeatable

  1. Impenetrable as an adjective:

    Not penetrable.

    Examples:

    "The fortress is impenetrable, so it cannot be taken."

  2. Impenetrable as an adjective (figuratively):

    Incomprehensible; fathomless; inscrutable.

    Examples:

    "Business jargon makes this document impenetrable, I can't understand it."

  3. Impenetrable as an adjective:

    Opaque; obscure; not translucent or transparent.

    Examples:

    "When night falls, she cloaks the world in impenetrable darkness."

  1. Undefeatable as an adjective:

    Not defeatable; impossible to defeat.

  1. Undefeatable as a noun:

    Something that has an undefeatable quality.