understatement
n
(a) [U] (action or practice of) understating 有节制的陈述或表达; 少说; 少报
a clever use of understatement, eg for effect 巧妙地轻描淡写(如为获得某种效果).
(b) [C] statement that expresses an idea, etc too weakly 重事轻说; 轻描淡写
To say that he was displeased is an understatement, ie He was furious. 说他不高兴是重事轻说(他已怒不可遏).