overburden
verb [ T often passive ] uk/ˌəʊ.vəˈbɜː.dən/ us/ˌoʊ.vɚˈbɝː.dən/
使不堪重负；使负担过重；使装载过多
to make someone or something work too hard or carry, contain, or deal with too much
Insurance companies are already overburdened with similar claims. 保险公司已经被类似的索赔搞得不堪重负。
Now 5,000 new children will be attending the district's already overburdened school system. 现在5000名新学童将要进入本地区已经超负荷运转的学校系统。