existen

third-person plural present indicative of existir

teorías

plural of teoría

acerca

• Adv

  1. adjacent
  2. Only used in acerca de (“about; concerning”)

• Verb

origen

origin

del

of the, from the (+ a masculine noun in singular).

cinturón

1. belt
2. belt
3. cincture
4. seat belt

de

• Noun

  The name of the Latin-script letter D/d.

• Prep

varias

feminine plural of vario