Adjective

common, ordinary, plain, familiar, popular, vulgar mean generally met with and not in any way special, strange, or unusual. common implies usual everyday quality or frequency of occurrence
// a common error
// lacked common honesty and may additionally suggest inferiority or coarseness.
//common manners ordinary stresses conformance in quality or kind with the regular order of things.
// an ordinary pleasant summer day
// a very ordinary sort of man plain is likely to suggest homely simplicity.
//plain hard-working people familiar stresses the fact of being generally known and easily recognized.
// a familiar melody popular applies to what is accepted by or prevalent among people in general sometimes in contrast to upper classes or special groups.
// a writer of popular romances vulgar, otherwise similar to popular, is likely to carry derogatory connotations (as of inferiority or coarseness).
// souvenirs designed to appeal to the vulgar taste