chemiser

A technical verb meaning to line or sleeve something — chemiser une canalisation (to line or reline a pipe from the inside, a common trenchless repair technique) or, from the office sense of chemise (folder), to put documents into a folder.

• L'entreprise chemise les vieilles canalisations sans les creuser. — The company relines old pipes without digging them up.
• La secrétaire chemise les dossiers avant de les classer. — The secretary puts the files into folders before filing them.
• On a chemisé le tuyau fissuré plutôt que de le remplacer. — The cracked pipe was relined instead of being replaced.

This is a specialized construction or office term, not an everyday word — don't confuse it with habiller (to dress) even though chemise also means 'shirt'; the pipe-lining sense in particular is trade jargon most learners won't need.