underailable

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English[edit]

Etymology[edit]

un- +‎ derailable

Adjective[edit]

underailable (not comparable)

  1. That cannot derail, or be derailed.
    • 1953, Railway Gazette, Diesel Railway Traction‎[1]:
      It is claimed that this gives a locomotive which is almost underailable, and that its flexibility eliminates all secondary reactions in bogies and body.
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