This is the 7583rd most frequent Chinese word.
负责任
To take responsibility.
In this sentence, 负责任 is used to indicate the responsibility a person has to take for their own actions.
他对自己的行为必须负责任。
He must take responsibility for his actions.
Here, 负责任 describes the characteristic of being responsible, emphasizing adherence to responsibilities.
作为领导者，她总是非常负责任。
As a leader, she is always very responsible.
In this context, 负责任地 is used as an adverb meaning 'responsibly,' modifying the verb to denote performing an action with prudence and accountability.