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
That military commander remained unwaveringly loyal to his lord.
Compound of 忠 (loyalty) and 純 (purity). The exact historical derivation is uncertain, but the combination naturally expresses pure-hearted loyalty.