封ふう緘かんふうかんConjugationMeanings1noun, noun or participle which takes 'suru', transitive verbseal (letters, documents, etc.)Formal term for sealing envelopes, documents, or containers, often with a physical seal or adhesive. Used in official, legal, or business contexts.重じゅう要よう書しょ類るいは封ふう緘かんしてから送そう付ふしてください。Please seal the important documents before sending them.