rudimentary
/ˌɹuːdɪˈmɛntəɹi/
noun
Meaning
(usually in the plural) One of the rudimentary mammae of boars.
adjective
Meaning
Of or relating to one or more rudiments.
"I have only a rudimentary grasp of chemistry."
Basic; minimal; with less than, or only the minimum, necessary.
"His grasp of rudimentary English allowed him at least to do the shopping."