noun
faithfulness and purity; unswerving loyalty
A somewhat formal or literary noun describing wholehearted, pure-hearted loyalty. Often used in historical, political, or moral contexts.
彼の忠純な心は誰もが認めるところだ。
Everyone acknowledges his pure-hearted loyalty.
その武将は主君への忠純を貫いた。
That military commander remained unwaveringly loyal to his lord.