動詞 broaden:

1. make broader
2. extend in scope or range or area
   同義詞：widen, extend
3. vary in order to spread risk or to expand
   同義詞：diversify, branch out
4. become broader

1. Our country has been trying to broaden its commerce with other nations.
   我國一直在努力擴大與其他國家的貿易往來。
2. He (ie His body) broadened out in his twenties.
   他二十多歲時身軀變寬了。
3. You should broaden your experience by travelling more.
   你應該多到各地走走以增廣見識。
4. The road broadens (out) after this bend.
   經過這一彎處以後，路就變寬了。

broad.en

v.tr.intr.（及物動詞和不及物動詞）
broad.ened,broad.en.ing,broad.ens
To make or become broad or broader.
使寬或變得寬或更寬

【引伸】
broad.ener
n.（名詞）