Rudimentary [Adj.]‏

1. Basic; minimal; with less than, or only the minimum, necessary.

2. Of or relating to one or more rudiments (a fundamental principle or skill, especially in a field of learning).

Methought he was a brother to your daughter;
But, my good lord, this boy is forest-born,
And hath been tutor’d in the rudiments

– William Shakespeare As You Like It (Act V Scene iv)