The focus after the disaster was the re-establishment of essential services and infrastructure.

re-establishment 是由前缀 re-（表示"重新"）和名词 establishment（建立、设立）组成的复合名词。establishment 来自动词 establish（建立），加上名词后缀 -ment 构成。re-establishment 字面意思是"重新建立"，在这里指"恢复"基本服务和基础设施。