complexe
complex
adjective noun kohm-PLEX Rare
Origin: Latin complexus ('entwined')
Also means
complicated
Usage Note
Complexe works as both an adjective (un problème complexe) and a masculine noun. As a noun it means either a psychological complex (avoir des complexes = to have hang-ups/insecurities) or a large facility (un complexe sportif = a sports complex). The derived noun complexité means complexity. Note the adjective does not change form between masculine and feminine.
Examples
"Cette situation est vraiment complexe."
Natural Translation
This situation is really complex.

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