rudimentary
Word family adjectiverudimentalrudimentaryadverbrudimentarilynounrudimentarinessrudiment
ru·di·men·ta·ry /ˌruːdəˈmentəri◂/ adjectiveadj 2 SIMPLE/NOT COMPLICATEDrudimentary equipment, methods, systems etc are very basic and not advanced 〔设备、方法、系统等〕简陋的,不先进的 subsistence farming in its most rudimentary form 最原始方式的自给性耕作
The classroom equipment is pretty rudimentary. 教室里的设备相当简陋。