As teachers, we have the responsibility to guide students in making right choices.

responsibility 是由形容词 responsible（负责任的）加上名词后缀 -ity 构成的名词，表示"责任、职责"的意思。responsible 本身由前缀 re-（表示"回、再"）和词根 spond（承诺、回应）组成，字面意思是"能够回应承诺的"。