rudimentary
ru|di|men|ta|ry /r'uːdɪm'entri/
1 [ADJ]
Rudimentary things are very basic or simple and are therefore unsatisfactory. (FORMAL)
...a kind of rudimentary kitchen...
2 [ADJ]
Rudimentary knowledge includes only the simplest and most basic facts. (FORMAL)
He had only a rudimentary knowledge of French.
= basic
1 [ADJ]
Rudimentary things are very basic or simple and are therefore unsatisfactory. (FORMAL)
...a kind of rudimentary kitchen...
2 [ADJ]
Rudimentary knowledge includes only the simplest and most basic facts. (FORMAL)
He had only a rudimentary knowledge of French.
= basic