IPA: /ˈɡrɪlər/
KK: /ˈɡrɪlər/
A person or device that cooks food over a grill, usually using direct heat.
The griller prepared delicious burgers for the barbecue.
Griller is derived from the French word 'griller' (meaning to grill or roast). The suffix '-er' indicates a person who performs the action. Therefore, a griller is a person who grills food.
Think of someone who 'grills' food — the French word 'griller' means to grill, and the '-er' shows that it's a person doing the grilling.