reliable

/rɪˈlaɪəbəl/
adjective
  1. Able to be trusted to do something well or to behave in a way that is expected; dependable.
    • We need a reliable babysitter for our children.
    • She is a reliable employee who always meets her deadlines.
    • My car is old but very reliable; it never breaks down.
  2. Giving the same result on repeated occasions; consistent and accurate.
    • The test is a reliable measure of a student's reading ability.
    • We need reliable data before making a decision.
    • This thermometer is reliable and gives the same reading every time.
Antonyms
What does "reliable" mean? | whatsthatwordmean | whatsthatwordmean