die-hard

Deverbal from die hard.

die-hard (comparative more die-hard, superlative most die-hard)

1. Alternative spelling of diehard.
   • 1955 April, Cecil J. Allen, “British Locomotive Practice and Performance”, in Railway Magazine, page 261:

     And the kaleidescope ^[sic] of distinctive colours sported by the spotlessly-maintained diesels of many different railways in the great Union stations of cities like Washington and St. Louis must have some thrills even for the most die-hard steam enthusiast.

die-hard (plural die-hards)

1. Alternative spelling of diehard.

• dihedra