rudimentary

adjective
1
dealing with only the most basic matters or ideas
ابتدایی, اولیه, پایه‌ای
synonym basic
2
not highly or fully developed
ابتدایی, اولیه, ناپیشرفته, ناقص
Some dinosaurs had only rudimentary teeth.
the most rudimentary forms of life
a very rudimentary writing system
synonym basic