rudimentary

1 ENTRIES FOUND:
rudimentary /ˌruːdəˈmɛntəri/ adjective
rudimentary
/ˌruːdəˈmɛntəri/
adjective
Britannica Dictionary definition of RUDIMENTARY
[more rudimentary; most rudimentary] formal
1 
: basic or simple
2 
: not very developed or advanced