elementary
adjective
1 an elementary astronomy course | the elementary principles of accountancy:
basic, rudimentary, fundamental, basal;
primary, preparatory, introductory, initiatory, early;
essential, radical, underlying;
rare rudimental.
▷antonyms advanced.
2 playing the blues really is elementary:
easy, simple, straightforward, uncomplicated, undemanding, unexacting, effortless, painless, uninvolved, child's play, plain sailing;
rudimentary, facile, simplistic;
informal as easy as falling off a log, as easy as pie, as easy as ABC, a piece of cake, easy-peasy, no sweat, kids' stuff.
▷antonyms difficult, complicated.