noun, noun or participle which takes 'suru', transitive verb
additional remark; postscript; saying in addition
Used for a supplementary comment or note added to a statement, document, or explanation. Often appears in formal or written contexts.
報告書の最後に一言付言しておきます。
I will add a brief additional remark at the end of the report.
彼
He added to his opinion that there are exceptions.