hear it again

1 : elementary, fundamental
2 : very imperfectly developed or represented only by a small part compared to the fully developed form

Example sentence:
Although he has only a rudimentary education, Janet's grandfather is very knowledgeable about political issues.

Etymology:
Both "rudimentary" and "rude" can be traced back to the Latin root "rudis," meaning "raw" or "rude." ("Rude" in this case means "being in a rough or unfinished state, roughly made.") You can see the family resemblance in another "rudis" offspring, "rudiment." "Rudiment" most commonly means "a basic principle or skill" (as in "the rudiments of grammar"), and "something unformed or undeveloped" (as in "the rudiments of a plan"). Another descendant of "rudis" is "erudite," meaning "having or showing wide knowledge gained chiefly from books." It traces to a Latin word for "instruct," which was formed when the Latin prefix "e-" (meaning "out" or "away") joined "rudis."