crux

Preposition: of

• matter: The crux of the matter was Mosley's health.
• argument: Which brings us to the crux of the argument.
• debate: Indeed, this is the crux of the entire debate.
• story: The crux of the story is a very British tragedy.
• problem: What do you think the crux of the problem lies in?
• route: The second section is the technical crux of the route.

Converse of object

• encode: My concern is how this encoding crux modifies the question, " what is the text?
• lie: Here, it seems to me, lies the crux.
• form: Weather he does or not forms the crux of the story...
• provide: Pulling into the overhanging niche above provides the crux of the climb.
• become: Jesus becomes the crux of every man's destiny.

Adjective modifier

• technical: The second section is the technical crux of the route.
• main: The main crux of my problem is the usual once bitten twice shy thing.
• real: This is a real crux in the gospel of John.
• very: Simple stories, that go to the very crux of what being human really means.
• whole: Well, to me that is the whole crux of the issue.

Modifies a noun

• pitch: Stephen Reid starting up the crux pitch of Caucus Race on the first ascent.
• move: A short very low traverse with funny crux move.
• section: The start is dirty and the crux section short but complex.
• point: I wanted to comment on the second paragraph of your last post, which I think is probably a crux point.