1. working steadily at a job or activity
Usage: present participle of ‘ply’
2. traveling regularly over a route
Usage: often used of vehicles or vessels
3. persistently offering or supplying something to someone

Examples

• The carpenter was plying his trade in the workshop.
• Ferries have been plying these waters for decades.
• The taxi driver was plying the busy downtown route.
• She kept plying her guests with food and drinks.
• The merchant was plying his wares at the market.
• Buses are plying between the airport and the city center.