inexcusable /ˌɪnɪkˈskjuːzəbəl/

• 1. 

  ADJ If you say that something is inexcusable, you are emphasizing that it cannot be justified or tolerated because it is extremely bad. 没法辩解的; 不可原谅的 [强调]

  例：

  He said the killing of innocent people was inexcusable.

  他说滥杀无辜是不可原谅的。

• 2. 

  inexcusably ADV

  例：

  She had been inexcusably careless.

  她曾粗心大意得不可原谅。