mere or merely. A weak adjective or adverb that is a 'filler' word such as like. Sometimes used by songwriters to fill out the meter of their lyrics. Other than the latter group, the written or spoken sentence can get along quite nicely without the word.
A little word that creeps in in all kind of places where it doesn't belong.An easy way of trivialising something without having to justify the trivialisation, and often without the hearer even realising what is happening.