In modern Chinese,
烹 mostly survives in compounds:
烹饪 (cooking, culinary art),
烹调 (to cook),
烹饪学校 (culinary school). Rarely used alone except in literary/classical contexts. The grim historical sense —
烹刑 (boiling alive) — was a real punishment in pre-imperial and early imperial China and shows up in
史记 stories about figures like
郦食其 boiled by Tian Heng.