固执己见
Abide by one's opinion.
Stick to one's gun.
Take the bit in one's teeth .
Have a will of one's own.
Nail one' s colours to the mast.

eg：The man was obstinate enough to abide by his opinion.

中英俚语俗语来源：宋史·陈宓传："固执己见，动失人心。 "

同义词：刚惺自用 Reckon without one's host.
反义词：收回成命 Eat one' s words.