在古代，传教士们常常试图改变那些被视为异教徒的部落的信仰。

In ancient times, missionaries often tried to convert tribes they considered ___heathens.

他穿着拖鞋去参加正式晚宴，简直像个野蛮人。

Wearing slippers to the formal dinner, he acted like a complete ___heathen.