Fromdécadent +‎-isme.

• IPA^(key):/de.ka.dɑ̃.tism/ ~/de.ka.dɑ̃.tizm/

• Audio:

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décadentisme m (pluraldécadentismes)

1. (art,literature)decadentism,decadentmovement

• → Polish:dekadentyzm
• → Ukrainian:декаденти́зм(dekadentýzm)

• “décadentisme”, inTrésor de la langue française informatisé[Digitized Treasury of the French Language],2012.