also: しいしゅ
noun
Formal or literary term for the main point, purpose, or intended meaning of a statement, document, or action. Often used in official or academic contexts.
この文章の旨趣を簡潔に説明してください。
Please briefly explain the purport of this document.
彼の発言の旨趣は、改革の必要性を訴えることだった。
The intent of his statement was to call for the need for reform.
趣旨 (しゅし) is much more common and means 'gist' or 'main point'. 旨趣 is a formal, less frequent synonym with a similar meaning but a more literary tone.
Compound of 旨 (むね, 'purport, gist') and 趣 (おもむき, 'purport, effect'). The exact historical derivation is uncertain; the spelling is conventionally associated with the meaning 'objective, intent'.