first_rudiment
1. [ noun ] the elementary stages of any subject (usually plural)
Synonyms: first_principle abc abc's abcs alphabet rudiment
Examples:

"he mastered the rudiments of geometry"

Related terms: fundamentals plural
Similar spelling:   first_moment
  first_reading
  First_Crusade
  First_Reich
  first_grade
  First_Amendment
  first_trimester
  first_light
  first_strike
  first_lieutenant
  first_degree