elementary

elementary /ˌɛləˈmɛntri/ adjective
elementary
/ˌɛləˈmɛntri/
adjective
Britannica Dictionary definition of ELEMENTARY
1 
[more elementary; most elementary] : basic and simple
: involving the simplest parts of a subject
— compare elemental
2 
always used before a noun, chiefly US : of or relating to elementary school