to heat empty cookware (as when forgetting to put water in a kettle, pot, etc.); to dry heat cookware

heating empty cookware (as when forgetting to put water in a kettle, pot, etc.); dry heating cookware

empty air / meaninglessness / (Buddhism) sunyata: emptiness, vacuity, awareness, openness, thusness / (Buddhism) void: one of the 五大 (godai, literally “great five”) and the highest of the five elements

being unnecessary / uselessness / being unused

unnecessary / useless / unused

to burn (something)

burn, light (a fire) / heat (a bath) / (photography) use (a flash)

(archaic) (as for) today

today, this day / nowadays

Same as こんにち above