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[kruhks] /krʌks/

noun, plural cruxes, cruces
[kroo-seez] /ˈkru siz/ (Show IPA)
a vital, basic, decisive, or pivotal point:
The crux of the trial was his whereabouts at the time of the murder.
a cross.
something that torments by its puzzling nature; a perplexing difficulty.
[kruhks] /krʌks/
noun, genitive Crucis
[kroo-sis] /ˈkru sɪs/ (Show IPA). Astronomy.
noun (pl) cruxes, cruces (ˈkruːsiːz)
a vital or decisive stage, point, etc (often in the phrase the crux of the matter)
a baffling problem or difficulty
(mountaineering) the most difficult and often decisive part of a climb or pitch
a rare word for cross
noun (Latin genitive) Crucis (ˈkruːsɪs)
the more formal name for the Southern Cross

1814, “cross,” from Latin crux “cross” (see cross (n.)). Figurative use for “a central difficulty,” is older, from 1718; perhaps from Latin crux interpretum “a point in a text that is impossible to interpret,” in which the literal sense is something like “crossroads of interpreters.” Extended sense of “central point” is from 1888.

crux (krŭks, kruks)
n. pl. crux·es or cru·ces (krōō’sēz)
A cross or a crosslike structure.


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