el fondo (noun)

Frequency star
  1. bottom, base (of an object, container, or body of water)
  2. background (of an image, scene, or context)
  3. depth, extent (figurative, e.g. “en el fondo” – deep down, at heart)
  4. fund (financial)
  5. fund, stock, collection (e.g. of books, resources)
  6. long-distance (in sports, e.g. “corredor de fondo” – long-distance runner)

Ha limpiado el coche a fondo.

He has cleaned the car thoroughly.

Mi tía invierte cada mes en un fondo de pensiones bastante arriesgado.

My aunt invests every month in a fairly risky pension fund.

Remueve la sopa antes de que se pegue al fondo de la olla.

Stir the soup before it sticks to the bottom of the pot.

El pozo era tan hondo que no veíamos el fondo.

The well was so deep we couldn't see the bottom.