ply
US /plaɪ/
UK /plaɪ/

1.
exercer, manier
work with (a tool, especially one requiring skill)
:
•
He continued to ply his trade as a carpenter.
Il a continué à exercer son métier de charpentier.
•
The weaver began to ply her shuttle.
La tisserande commença à manier sa navette.
2.
3.
faire la navette, parcourir
(of a boat or vehicle) travel regularly over a route, typically for commercial purposes
:
•
Ferries ply between the islands.
Les ferries font la navette entre les îles.
•
Buses ply the main roads of the city.
Les bus parcourent les routes principales de la ville.