informality

名词 informality:

1. a manner that does not take forms and ceremonies seriously
2. freedom from constraint or embarrassment
   同义词：ease

1. Characterized by careless ease or informality; casual.
   漫不经心的以漫不经心或随便态度为特点的; 漠不关心的

in.for.mal.i.ty

n.（名词）
【复数】 in.for.mal.i.ties
The state or quality of being informal.
非正式：不正式的状态或品质
An informal act.
不正式的举动