Reliable
/rɪˈlaɪəbəl/
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Definition
(adj) Suitable or fit to be relied on; worthy of dependence, reliance or trust; dependable, trustworthy
Sentence Examples
He is a good fellow, to be sure, but he isn't reliable.
Encryption technology has advanced to the point where it's pretty reliable.
CEFR Practice Quiz
She was known as a ____ colleague who always delivered on her commitments without fail.