Necessary clarification for the "low information" casters:
This is not intended as criticism, but only as a gentle correction for the unknowing who might pick up the wrong word from having read it in news stand magazines, having been edited by persons who only got a "C" in English.
ob·du·rate ˈäbd(y)ərət/ adjective
stubbornly refusing to change one's opinion or course of action.
synonyms: stubborn, obstinate, intransigent, inflexible, unyielding, unbending, pigheaded, bullheaded, mulish, stiff-necked; headstrong, unshakable, intractable, unpersuadable, immovable, inexorable, uncompromising, iron-willed, adamant, firm, determined
"the brass were also obdurate in their opposition to having women in any combat positions"
obturate [ob-tuh-reyt, -tyuh-] verb (used with object), obturated, obturating.
1. Dental. to stop up; close. To mitigate bleeding from the jaw canal after a tooth extraction.
2. Ordnance. to close (a hole or cavity) so as to prevent a flow of gas through it, especially the escape of explosive gas from a gun tube during firing. When used as an object, "obturator," a gas sealing device placed between the booster or igniter pack and the main propelling charge in separate-loaded artillery.