matron

n. 妇女,主妇,保姆

The matron told me not to worry about the operation.

护士长告诉我不要为手术担心。

The matron looked a comfortable, motherly soul but she soon showed her teeth if any of the inmates gave signs of having minds of their own.

那个女看守看上去内心平静，待人像慈母一般，但是只要被收容者有迹象自作主张，她可就不那么客气了。