noun, noun or participle which takes 'suru'
warm up (engine/machine)
Technical term for warming up an engine or machine before use, often used in automotive and mechanical contexts.
寒い朝は、車のエンジンを暖機してから出発したほうがいい。
On cold mornings, it's better to warm up the car engine before setting off.
暖機運転
Please wait a moment until the warm-up operation is complete.