elementary
She is trying to maintain an elementarily simple morning routine.
The ancient statues are so elementarily powerful.
Please explain it to me elementarily as I've never studied science.
The patient can elementarily take care of himself, as he has a good range of movements.

SMART Vocabulary: related words and phrases

Easiness and simplicity
(as) easy as pie/ABC/anything/falling off a logidiom
a piece of cakeidiom
accessibility
at the push of a buttonidiom
at the stroke of a penidiom
be a matter of somethingidiom
foolproof
frictionless
frictionlessly
friendly
gift
painlessly
painting
painting by numbersidiom
the path of least resistanceidiom
walkaway
walkover
wieldy
with your eyes closed/shutidiom
within the capacity of someone/something