a. [UN-1 7 b.] Not to be depended upon; unreliable, untrustworthy.
1860. Sat. Rev., 10 March, 303/2. The praises of the official world are, from obvious reasons, quite undependable.
1865. W. G. Palgrave, Arabia, I. 193. The fickle and undependable Bedouins.
1894. ‘J. S. Winter,’ Red-Coat, 63. Just a fickle, changeable thing … an undependable nothing.
