Ept

These behaviors, developed in extremely bad basic and advanced training conditions were continued in better situations under more ept leadership.

...known the ways of the world in Washington, and may not have been as one of my colleagues in the legislature said, "very ept", when it came to this stuff.

They're confident, calm, at ease, talkative, cheerful, and above all, socially very "ept."

And someone who wasn't glacier ept might have thought the mouth of a glacier a great place to hide a body for a long, long time.