communaliser

Communaliser is a rare, technical verb meaning to place property or a service under communal (municipal) ownership or control — historically used for land reforms and, more recently, for municipalizing public services (communaliser la distribution d'eau). It's a specialist term from politics and economics, not everyday vocabulary.

• La commune a décidé de communaliser la gestion de l'eau. — The town decided to municipalize water management.
• Au XIXe siècle, certains réformateurs voulaient communaliser les terres agricoles. — In the 19th century, some reformers wanted to municipalize agricultural land.
• Communaliser un service public revient à le confier à la commune plutôt qu'à une entreprise privée. — Municipalizing a public service means entrusting it to the town rather than a private company.

This is a rare, specialist verb — there's no common everyday mistake to flag; the main trap for learners is confusing it with communiquer or communier, which look similar but mean something completely different.