understate       
verb [ T ] uk/ˌʌn.dəˈsteɪt/ us/ˌʌn.dɚˈsteɪt/
 对…轻描淡写;不如实陈述;避重就轻地说
to describe something in a way that makes it seem less important, serious, bad, etc. than it really is
  She believes the research understates the amount of discrimination women suffer. 她认为该研究对妇女所遭受的歧视轻描淡写。 
 Synonyms: downplayminimize
Opposites: emphasizeexaggerateforeground highlight overplayoverstatespotlight