simplistic
ultrasimple
supersimple
easy peasy
forthright
simplish
easyish
onefold
haplo-
nothing to it
simple as kiss your hand
easy as falling off a log
easy as pie
piss-easy
stark
stern
severe
pimpsy
austere
there's nothing to it
purely and simply
downhill
cake walk
eathy
mick
nimps
plain sailing
uncomplicated
easy as ABC
easy as 123
straightforward
supereasy
stock
smooth
plainly
uncryptic
plainful
uncomplication
decomplication
straightforwardly
dizzy
child's play
open-and-shut
doof
maffling
loon
woodcock
incomplex
dumbed-down
oversimplicity
easy
cut and dried
plain
waltz
bludge
rondoletto
plain as Dunstable highway
clear cut
easify
au naturel
plaintively
straight from the shoulder
basical
nonsimple
unelaborate
unsimple
patent
broad
lor
overplain
plat
supersimplification
cinch
flatling
sell
simplex
easy peasy lemon squeezy
spell things out
easefully
mawkin
puddysticks
like taking candy from a baby
simpleness
nontaxing
tortuous
uniplex
monoplex
lead-pipe cinch
in front of one's nose
inexplicitly
facile
complex
unstuffy
unembroidered
spell out
cinchy
open-hearted
unquibbled
oversimple