Alumni or Alumnus?

Very often, ESN members do not know how to correctly declare the word Alumni and what is its origin. So how is it really with this pun?
The word alumnus, possibly alumni, comes from Latin and refers to inmates. It translates from English as a graduate. The singular is alumnus, in feminine gender is the singular number of alumna. In the plural, these "graduates" or "inmates" of ESN Network are referred to as Alumni. 

 

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