名詞 bracing:

1. a structural member used to stiffen a framework
   同義詞：brace

動詞 brace:

1. prepare (oneself) for something unpleasant or difficult
   同義詞：brace, poise
2. support or hold steady and make steadfast, with or as if with a brace
   同義詞：brace, steady, stabilize, stabilise
3. support by bracing
   同義詞：brace
4. cause to be alert and energetic
   同義詞：stimulate, arouse, brace, energize, energise, perk up

形容詞 bracing:

1. imparting vitality and energy
   同義詞：brisk, energizing, energising, fresh, refreshing, refreshful, tonic

1. My daughter has to wear a brace on her teeth.
   我的女兒得戴牙箍以矯正牙齒。
2. A bracing tonic.
   提神的補品

brac.ing

adj.（形容詞）
Invigorating or refreshing; strengthening:
振奮精神的：振奮精神的或清爽的；令人奮發(fā)的：
例句：
a bracing tonic.
提神的補品

n.（名詞）
A support; a brace.
支持；支柱
Braces considered as a group.
一組大括號

【引伸】
brac.ingly
adv.（副詞）