靠不住

unreliable

no; not so / (bound form) not; un-

to live / to dwell / to stay / to reside / to stop / (suffix indicating firmness, steadiness, or coming to a halt)

to lean against or on / to stand by the side of / to come near to / to depend on / to trust / to fuck (vulgar) / traditional military costume drama where the performers wear armor (old)

repeatedly / continuously / constantly / unable to (resist, conceal etc)

(verb complement) unable to firmly or securely (grasp, recall etc) / repeatedly; continuously; constantly