Phrase
at peace
adjective
平静的，安宁的
in a state of tranquility or calm, especially after a period of conflict or stress
常指内心或局势的平静
安泰
In use
After years of conflict, she finally felt at peace.
The garden was so quiet that I felt completely at peace.
He is at peace with his decision to retire early.
be at peace
常用于描述内心宁静的状态。
After years of struggle, she is finally at peace.
经过多年的奋斗，她终于平静下来了。
feel at peace
He felt at peace when he walked in the forest.
他在森林里散步时感到安宁。
be at peace with sth
后接名词或代词，表示与某事达成和解。
She is at peace with her decision to change careers.
她对自己换工作的决定感到心安。
at peace with oneself
强调与自身和谐。
He feels at peace with himself after the reconciliation.
和解后，他内心感到平静。
Common mistakes
After meditation, I feel in peace.After meditation, I feel at peace.
表达内心平静应使用固定短语at peace，而in peace多指外在和平或不受打扰的状态。
She is peace with herself.She is at peace with herself.
at peace是固定短语，不能省略at；直接用peace作形容词不符合英语语法。
Connections
Learner notes
Grammar Note
常与be或feel连用
Dictionary facts from ECDICT.