loyal

faithful staunch steadfast true

disloyal

The buck stops here. a backseat driver a man of his word/a woman of her word a safe pair of hands a woman of her word absolute loyalty answer for answer to be as good as your word be compos mentis be responsible to sb/sth be sb's pigeon be unaccountable to sb/sth cast-iron come through

التعاون وتقديم العون المصداقية والموثوقية