noun
kettle rest; trivet for a kettle
A stand or mat placed under a hot kettle to protect the surface beneath.
急須を置く前に釜敷を敷いてください。
Please put down a kettle rest before placing the teapot.
鍋敷き is a trivet or mat for pots and pans in general, while 釜敷 is specifically for kettles.
Compound of 釜 (kama, 'kettle') and 敷き (shiki, 'spreading' or 'mat').