simple

Length / number of characters: 6
Number of words: 1

apart from anything else
Plain
Mere
exhibiting childlike simplicity and credulity
Direct
lacking mental capacity and subtlety
easy and not involved or complicated
Weak in intellect
Homogenous
Not luxurious
Single
any herbaceous plant having medicinal properties
a person lacking intelligence or common sense
having few parts
(botany) of leaf shapes
unornamented
Not given to artifice, stratagem, or duplicity
Artless in manner
Humble
Without subdivisions
Not capable of being decomposed into anything more simple or ultimate by any means at present known
Consisting of a single individual or zooid
Something not mixed or compounded
A medicinal plant
A drawloom
A part of the apparatus for raising the heddles of a drawloom
A feast which is not a double or a semidouble
To gather simples, or medicinal plants
Residential area (city, town, village) in France in Pays de la Loire

You can also check definition for simple on wikipedia or google (link opens in new window)