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

She was a tiny girl, but she really held her own on the baritone sax. Nonetheless, I couldn't help but imagine the thing wrapping itself around her and devouring her like a boa constrictor.

Between you and me, he cannot be relied upon.

This man is not reliable.

He doesn't live in my neighborhood.

Her line of reasoning is attractive, but ultimately fallacious.