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simple

simple /ˈsɪmpəl/ adjective
simpler; simplest
simple
/ˈsɪmpəl/
adjective
simpler; simplest
Britannica Dictionary definition of SIMPLE
[or more simple; most simple]
: not hard to understand or do
: having few parts : not complex or fancy
always used before a noun : not special or unusual : ordinary
always used before a noun : complete and total used for emphasis
grammar, of a sentence : having only one main clause and no additional clauses
old-fashioned : not very intelligent

pure and simple

see pure

the simple life

◊ If you live the simple life, you do not own many things or use many modern machines and you usually live in the countryside.