simple

nouns

any herbaceous plant having medicinal properties
domain usage
the use of an archaic expression
is a type of (narrower)
a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests
a person lacking intelligence or common sense

adjectives

having few parts; not complex or complicated or involved
"a simple problem"; "simple mechanisms"; "a simple design"; "a simple substance"
is derived from
is derived from
antonym
is similar to
having only one part or element
"a simplex word has no affixes and is not part of a compound--like `boy' compared with `boyish' or `house' compared with `houseboat'"
is similar to
characterized by extreme and often misleading simplicity
"a simplistic theory of the universe"; "simplistic arguments of the ruling party"
is similar to
representing the furthest possible extent of analysis or division into parts
"a feeling is a simple and undecomposable mental state"- G.S.Brett; "this weight of evidence is something mystical and unanalyzable"-M.R.Cohen
is similar to
lacking complexity
"small and uncomplicated cars for those really interested in motoring"; "an unsophisticated machine"
see also
posing no difficulty; requiring little effort
"an easy job"; "an easy problem"; "an easy victory"; "the house is easy to heat"; "satisfied with easy answers"; "took the easy way out of his dilemma"
see also
not elaborate or elaborated; simple
"plain food"; "stuck to the plain facts"; "a plain blue suit"; "a plain rectangular brick building"
see also
(botany) of leaf shapes; of leaves having no divisions or subdivisions
is an attribute of
the quality of being intricate and compounded
"he enjoyed the complexity of modern computers"
easy and not involved or complicated
"an elementary problem in statistics"; "elementary, my dear Watson"; "a simple game"; "found an uncomplicated solution to the problem"
is derived from
is derived from
apart from anything else; without additions or modifications
"only the bare facts"; "shocked by the mere idea"; "the simple passage of time was enough"; "the simple truth"
exhibiting childlike simplicity and credulity
"childlike trust"; "dewy-eyed innocence"; "listened in round-eyed wonder"
is derived from
is derived from
lacking mental capacity and subtlety
is derived from
(botany) of leaf shapes; of leaves having no divisions or subdivisions
is derived from
antonym
unornamented
"a simple country schoolhouse"; "her black dress--simple to austerity"
is derived from
is derived from
is similar to
not elaborate or elaborated; simple
"plain food"; "stuck to the plain facts"; "a plain blue suit"; "a plain rectangular brick building"