動(dòng)詞 build-up:

1. enlarge, develop, or increase by degrees or in stages
   同義詞：build up
2. form or accumulate steadily
   同義詞：build up, work up, build, progress
3. prepare oneself for a military confrontation
   同義詞：arm, build up, fortify, gird
4. bolster or strengthen
   同義詞：build up, work up, build, ramp up
5. change the use of and make available or usable
   同義詞：build up, develop

形容詞 built-up:

1. peopled with settlers

built-up

adj.（形容詞）
Made by fastening several layers or sections one on top of the other:
組合的，合成的：通過將幾層或幾部分逐個(gè)疊加而合成的：
例句：
a built-up roof.
一個(gè)組合房屋

Filled with buildings; developed:
建筑物多的；發(fā)展的：
例句：
a built-up neighborhood.
一個(gè)多建筑物的鄰區(qū)