[tàn tāng dǎo huǒ]   

探    汤    蹈    火    犹言赴汤蹈火。比喻不怕任何艰险。

比喻不怕任何艰险。

Go into boiling water and walk through fire and water

探口而出    探囊取物    探骊得珠    探囊胠箧    探头缩脑