el sobre (noun, preposition)

Frequency star
  1. on, on top of
  2. over, above
  3. about, regarding
  4. envelope

No discutas conmigo sobre en la , por favor.

Don't argue with me about politics at dinner, please.

El abuelo siempre refiere anécdotas rarísimas sobre su época de pirata.

Grandpa always tells the weirdest anecdotes about his time as a pirate.

El detective miró el sobre sospechoso antes de abrirlo.

The detective looked at the suspicious envelope before opening it.

La novela trata sobre la muerte lenta de un pueblo minero.

The novel is about the slow death of a mining town.

Mañana tengo que dar una exposición sobre el reciclaje delante de toda la clase.

Tomorrow I have to give a presentation on recycling in front of the whole class.