Select the most appropriate antonym of the word.

Obstinate

Flexible

The most appropriate antonym of the word "obstinate" is flexible.

• Obstinate means refusing to change one's mind or give in.
• Flexible means able to change or adapt easily.

The other words are not antonyms of "obstinate" because they have different meanings.

• Stern means severe or strict.
• Stubborn means refusing to change one's mind or give in, even when faced with evidence to the contrary.
• Adamant means unyielding or unshakable.