unspeakably
adv. 无法形容地；说不出地
例句
The novel was unspeakably boring.
这部小说无聊得无法形容。
《柯林斯英汉双解大词典》
The face was unspeakably sad.
脸上是说不出的悲伤。
The rice is steamed and is unspeakably delicious.
米饭蒸熟了，好吃得难以形容。
