accumulative accumulative /əˈkjʊmjəˌleɪtɪv/

adjective

1. Marked by acquiring or amassing  ( accumulative )
   marked by acquiring or amassing
    We live in an accumulative society
   we live in an accumulative society
   
2. Increasing by successive addition  ( accumulative , cumulative )
   increasing by successive addition
    The benefits are cumulative
   the benefits are cumulative
    The eventual accumulative effect of these substances
   the eventual accumulative effect of these substances