開封かいふう
kaifū

Noun
Suru Verb

1. opening (a letter, parcel, etc.); breaking the seal

Transitive
かれはその手紙てがみ開封かいふうしないでおくかえした。
karewa sono tegamio kaifū shinaide okurikaeshita.
He sent the letter back unopened.
Noun
Suru Verb

2. unboxing (a product)

Transitive
Noun

3. unsealed mail