This is the 861st most frequent Japanese word.
責任
Responsibility.
Here, '責任' (responsibility) is used to emphasize the importance of being responsible for one's actions.
責任を持って行動してください。
Please act responsibly.
Here, '責任' is about accepting and being accountable for the consequences or obligations of an action.
責任を取ることを約束します。
I promise to take responsibility.
In this sentence, '責任' is part of the word '責任者', which means the person responsible for something or in charge.