This is the 10939th most frequent Spanish word.
diesel
Diesel: A type of fuel used in diesel engines.
In this sentence, 'diesel' refers to the type of fuel used by the engine.
El motor funciona con diesel.
The engine runs on diesel.
Here, 'diesel' represents the commodity, specifically the fuel bought from suppliers.
El precio del diesel ha subido esta semana.
The price of diesel has increased this week.
In this usage, 'diesel' describes the type of generator, indicating it uses diesel fuel to operate.