frustratingly
adv. 令人泄气地；使人沮丧地（frustrate的副词形式）
词形变化
more frustratingly
比较级
most frustratingly
最高级
释义与例句
adv.
-
1.
In a frustrating manner; in a manner that causes frustration.
词源
From frustrating + -ly.
来源：wiktionary