Adjective

(en adjective)

Incapable of being subdued, overcome, or vanquished.

* 1902 , , The Four Feathers , ch. 1:

Personal courage and an indomitable self-confidence were the chief, indeed the only, qualities which sprang to light in General Feversham.

* 1910 , , A Shepherd's Life , ch. 7:

But he was a youth of indomitable spirit, strong and agile as a wild cat.

* 2007 , , " When Betty Got Frank," Time , 31 March:

Nobody came on to the movie camera—wrapped it in a bear hug and wrestled it to submission—like Betty Hutton. They called this 40s singer-actress "the Blitzkrieg blond" . . . . [S]he was indomitable , unstoppable.

Adjective

(en adjective)

Stubbornly persistent, generally in wrongdoing; refusing to reform or repent.

* Hooker

The very custom of evil makes the heart obdurate against whatsoever instructions to the contrary.

* Shakespeare

Art thou obdurate , flinty, hard as steel, / Nay, more than flint, for stone at rain relenteth?

* 1818 , ,"The Revolt of Islam", canto 4, stanza 9, lines 1486-7:

But custom maketh blind and obdurate

The loftiest hearts.

* {{quote-news

, year=2011 , date=February 12 , author=Les Roopanarine , title=Birmingham 1 - 0 Stoke , work=BBC citation , page= , passage=An injury-time goal from Nikola Zigic against an obdurate Stoke side gave Birmingham back-to back Premier League wins for the first time in 14 months.}}

(obsolete) Physically hardened, toughened.