ouvreur

ouvrir +‎ -eur.

• IPA^(key): /u.vʁœʁ/

ouvreur m (plural ouvreurs)

1. opener
2. forerunner
3. usher

ouvrer +‎ -eur (found in Old French as ovrëor, ovreur, ouvreor), possibly corresponding to Latin operātōr, operātōrem, and therefore a doublet of the borrowing opérateur.

ouvreur m (plural ouvreurs)

1. a worker in papermaking, charged with drawing out the paste from the vat and spreading it evenly to make a sheet
2. a worker in glassmaking
3. a worker who fashions textile materials and prepares them for weaving

• ouvrer
• ouvrier

• papetier
• verrier

• “ouvreur” in le Trésor de la langue française informatisé (The Digitized Treasury of the French Language).