how poisonous
He qiduye, the Chinese idiom, Pinyin is h é Q í D ú y ě, which means how vicious.
Idiom explanation
Also: the auxiliary words in classical Chinese are placed at the end of the word, which is combined with "he" to form a rhetorical mood. How vicious!.
Idiom usage
Example this person's intentions are so poisonous that we have to guard against them.
how poisonous