responsible

/rɪˈspɑnsəbəl/
adjective
  1. Having the duty to deal with something or someone; accountable.
    • The manager is responsible for the team's performance.
    • Who is responsible for this mess?
    • You are responsible for your own actions.
  2. Being the cause of something, especially something bad.
    • Stress can be responsible for many health problems.
    • A faulty wire was responsible for the fire.
    • The storm was responsible for the power outage.
  3. Reliable and able to be trusted.
    • We need a responsible person to handle the money.
    • She is a very responsible babysitter.
    • He is too young to be responsible with a car.