broaden
英 ['brɔːd(ə)n]
美['brɔdn]
	    - vi. 扩大,变阔;变宽,加宽
 - vt. 使扩大;使变宽
 
英英释意
- 1. make broader;
 - "broaden the road"
 
- 2. extend in scope or range or area;
 - "The law was extended to all citizens"
 - "widen the range of applications"
 - "broaden your horizon"
 - "Extend your backyard"
 
- 3. vary in order to spread risk or to expand;
 - "The company diversified"
 
- 4. become broader;
 - "The road broadened"