名词一本正经; 认真，沉着

1. 认真：staid 认真的 | staidness 认真 | stain 污点

2. 踏实：刻苦 assiduity | 踏实 staidness | 谨慎 carefulness

noun

1. a trait of dignified seriousness

Synonym: sedatenesssolemnitysolemness