reliable
🇺🇸
/rɪˈlaɪəbl/
🇬🇧
/rɪˈlaɪəbl/
able to be trusted to do something well
She is a reliable worker who always finishes her tasks on time.
likely to be correct or true
This is a reliable source of information for your research.
able to work well for a long time without problems
This reliable machine has worked for years without any issues.