Collocations for crux - noun Contents ADJECTIVE VERB + crux crux + VERB PHRASES ADJECTIVE real Back to top ▲ VERB + crux be This is the real crux of the issue to me. Back to top ▲ crux + VERB lie The crux of the matter lies in our lack of expert knowledge. Back to top ▲ PHRASES the crux of the matter, the crux of the problem Back to top ▲