動詞 reinforce:

1. make stronger
   同義詞：reenforce
2. strengthen and support with rewards
   同義詞：reward

1. Any good speaker should be able to reinforce his argument with facts.
   一個好的演講者會用事實來加強他論點。
2. The commander poured men in to reinforce the slaughtered battalions.
   指揮官投入大量兵員增援被打敗的部隊。
3. This evidence reinforces my view that he is a spy.
   這個證據證實了我認為他是間諜的這一看法。
4. Our defences must be reinforced against attack.
   我們必須加強防御設施以抵御進攻。

reinforce 也作 re-en.force 或 re.en.force

v.tr.（及物動詞）
re.in.forced,re.in.forc.ing,re.in.forc.es
To give more force or effectiveness to; strengthen:
增強：給予更多的力量或效力；加強：
例句：
The news reinforced her hopes.
這個消息增強了她的希望

To strengthen (a military force) with additional personnel or equipment.
增援：以額外的人員或裝備加強部隊的力量
To strengthen by adding extra support or material.
加強：用增加支持或物資來加強
To increase the number or amount of; augment.
增加：增加…的數量；增加
Psychology
【心理學】
To reward (an experimental subject, for example) with a reinforcer subsequent to a desired response or performance.
強化刺激法：在達到需要的反應或表現后給（例如試驗物）一個強化刺激的東西
To stimulate (a response) by means of a reinforcer.
強化刺激：用強化刺激的方法來刺激（一個人）

來源：
re-
re-
inforce variant of enforce
inforce enforce的變體

【引伸】
re.inforce.able
adj.（形容詞）