未開封(みかいふう)

みかいふう
noun, adjective (no)
unopened, sealed
1. unopened, sealed, still in original packaging
Describes a product or container that has not been opened from its original sealed state.
未開封(みかいふう)の商品(しょうひん)のみ返品(へんぴん)可能(かのう)です。
Only unopened items can be returned.
この牛乳(ぎゅうにゅう)は未開封(みかいふう)なら一週間(いっしゅうかん)持(も)つ。
This milk will keep for a week if left unopened.
押(お)し入(い)れから未開封(みかいふう)のまま忘(わす)れられていた荷物(にもつ)が出(で)てきた。
A package that had been forgotten while still unopened came out of the closet.

未開封(みかいふう) means "unopened" or "still sealed." It combines 未(み) (not yet) + 開封(かいふう) (opening a seal).

CONTRAST:

  • 未開封(みかいふう): unopened, still sealed
  • 開封(かいふう)済(ず)み: already opened

COMMON PATTERNS:

  • 未開封(みかいふう)の場合(ばあい): in the case of being unopened
  • 未開封(みかいふう)のまま: while still unopened
  • 未開封(みかいふう)品(ひん): unopened item
  • 未開封(みかいふう)に限(かぎ)り: only if unopened

OTHER 未(み)～ WORDS:

  • 未使用(みしよう): unused
  • 未読(みどく): unread
  • 未完成(みかんせい): incomplete, unfinished
  • 未定(みてい): undecided, TBD

NOTE:
Frequently seen on return policies, food labeling, and online marketplace listings.

general
Added 2026.2.9 11:36 · Revised 2026.3.30 11:16
10500/10677_mikaifuu