the.com/grilling
Applying fire to food, or questions to a suspect, with equal intensity.
means Cooking food over direct high heat on metal bars, or interrogating someone relentlessly.
from From the French gril, a cooking grate, descended from Latin craticula, a small wickerwork lattice — the cooking sense scorched its way into meaning interrogation by the 1840s, when answers were pried loose under heat.
Heat sourceDirect flame below, unlike baking's surrounding heat.
Maillard reactionBrowning chemistry creates that craved seared flavor.
Verbal senseSuspects get grilled long before steaks did.