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Adjective: reliable  ri'lI-u-bul
  1. Worthy of reliance or trust
    "a reliable source of information";
    - dependable
  2. Worthy of being depended on
    "a reliable source of information";
    - dependable, honest, true
  3. Conforming to fact and therefore worthy of belief
    "reliable information";
    - authentic

See also: certain, straight-up [informal], sure, tested, time-tested, tried, tried and true, trustable, trustworthy, trusty, undeviating

Antonym: undependable

Encyclopedia: Reliable