The idiom 'Burn the midnight oil' signifies 'To work late into the night'. Its origin lies in the pre-electric era, when oil lamps provided light for late-night activities like reading, writing, or studying. The phrase metaphorically represents prolonged work hours, often extending past midnight, to complete an assignment.
Comprehending idioms requires understanding that their meanings are not derived from the literal sense of their constituent words. For this idiom:
- To waste fuel: This interpretation is incorrect. The focus is on working extended hours, not on resource wastage.
- To work late into the night: This is the accurate meaning, accurately reflecting the act of staying up late for work-related tasks.
- To cook food at night: This is erroneous as the idiom has no connection to culinary activities.
- To light candles: While this involves illumination at night, it fails to convey the element of extended effort characteristic of the idiom.