WordWeb Online

1. Worthy of being depended on
   "a dependable worker";
   - honest, reliable, true
    
2. Consistent in performance or behaviour
   "dependable in one's habits";
   - rock-steady, steady-going
    
3. Financially safe
   "a dependable investment";
   - good, safe, secure
    
4. Worthy of reliance or trust
   "a dependable worker";
   - reliable

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

Antonym: unreliable