nonvulnerable en · ADJ
Etymology
From non- + vulnerable.
Meanings
-
(not-comparable) Not specifically vulnerable
Here are a couple of his tips: be slow to push the opponents out of one no-trump if they are vulnerable; conversely, strain to balance if they are nonvulnerable.
2009 January 17, Phillip Alder, “A Farewell to a Champion With a Gift for Reading Cards”, Bridge, in New York Times: