straightforwardly
straightforward
purely and simply
straight from the shoulder
prosaically
smooth
ingenuously
plaintively
au naturel
plain sailing
nothing to it
easy peasy
supersimple
simplistic
easefully
inexplicitly
uncomplicated
decomplication
onefold
easyish
cut and dried
uncomplication
affinely
telegraphically
squarely
tersely
presentably
summatively
practicably
forthrightly
haplo-
completely
directly
ultrasimple
fittingly
conveniently
handily
plain as Dunstable highway
complicitous
usably
appositely
uncryptic
paint by numbers
completively
unpretended
cake walk
uncryptically
adequately
elementarily
gamely