English Dictionary

set of one's jaw

noun

(set phrase) The manner of one's lower facial expression, especially as suggesting firm resolve, or intensity of thought or feeling.

He clenched his jaw tightly.

意味（1）

(set phrase) The manner of one's lower facial expression, especially as suggesting firm resolve, or intensity of thought or feeling.

But he made no audible comment, though his thoughts were as black as his brow and as grimly fashioned as the set of his jaw.