riflette

The sense of "war zone" is from rifle (“variant form of rif (“line of fire”)”) +‎ -ette.

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riflette f (plural riflettes)

1. (slang) war zone
2. (Louisiana) edge

• “riflette”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.
• Dictionary of Louisiana French: As Spoken in Cajun, Creole, and American Indian Communities (2009; →ISBN; →ISBN)

riflette

1. third-person singular present indicative of riflettere

• refletti