reliable

Synonyms: candid careful certain conscientious constant decent decisive definite dependable determined devoted faithful firm good high-principled honest honorable impeccable incorrupt loyal okay positive predictable proved reputable respectable responsible righteous safe sincere solid sound stable staunch steadfast steady sterling strong sure there tried tried-andtrue true true-blue true-hearted trusty unequivocal unfailing unimpeachable upright veracious

Antonyms: deceptive irresponsible unreliable untrustworthy