reliable
adjective
uk/rɪˈlaɪəbl/ usreliable information or data is accurate or able to be trusted:
Broker-dealers must use their judgment in assessing whether the issuer information is from a reliable source.
reliable information/data/evidence Currently, investors do not always have access to reliable information when they need it.
reliable figures/estimates/indicators The Consumer Price Index is a reasonably reliable indicator of inflation.
more/less reliable Research results are more reliable when they are independent of the person who has conducted the study.
a machine, piece of equipment, or system that is reliable always works well without breaking down:
Consumer demand for fuel-efficient, reliable vehicles is on the increase.
People are often willing to pay a premium for a familiar, reliable service.
While these disks function well as backup storage, they aren't reliable enough for long-term archiving.
more/less/the least, etc. reliable The hard disk on which data is stored is probably the least reliable component in a PC.
a reliable person is someone that you can trust to work hard and do what they say they will do:
Employers want reliable workers.
She's usually very reliable.
reliably
adverb /rɪˈlaɪəbli/
At this stage, long-term costs cannot be reliably estimated.