obstinacy

他的固执导致团队无法达成共识。

His ___obstinacy prevented the team from reaching a consensus.

尽管医生建议休息，他的固执让他继续工作。

Despite the doctor's advice to rest, his ___obstinacy made him keep working.

尽管医生建议他戒烟，但他的固执让他继续每天抽两包烟。

Despite the doctor's advice to quit smoking, his ___obstinacy made him continue smoking two packs a day.