dāo​qiāng​bù​rù

invulnerable

刀枪不入 (刀槍不入) dāo​qiāng​bù​rù
invulnerable idiom
impervious to physical weapons or bodily harm

义和团声称自己刀枪不入

Yì​hé​tuán shēng​chēng zì​jǐ dāo​qiāng​bù​rù.

The Boxers claimed to be invulnerable to swords and spears.

thick-skinned idiom
impervious to criticism, persuasion, or emotional influence

He has reached a state of being completely thick-skinned; he remains indifferent no matter how you scold him.

Frequency

Movie subtitles
1.37 per million appears in 1% of films
Written text
0.777 per million

Sources

Definitions
CC-CEDICT