1.
Bristling means thick, hairy, and rough. It is used to describe things such as moustaches, beards, or eyebrows.
...a ~ white moustache.
ADJ: ADJ n
2.
If you describe someone’s attitude as ~, you are emphasizing that it is full of energy and enthusiasm.
...~, exuberant, rock’n’roll.
ADJ: ADJ n emphasis