未 開 封(みかいふう)

みかいふう

noun, no-adjective

unopened, sealed

shopping

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." Frequently seen on return policies, food labels, and resale listings. It combines 未(み) (not yet) + 開封(かいふう) (opening a seal).

Similar words

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

Related 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

Related Words

Compare: 未使用(みしよう) (unused)

Compare: 新品未使用(しんぴんみしよう) (brand new, unused)

Related: 未読(みどく) (unread)

Related: 未完成(みかんせい) (incomplete, unfinished)

Related: 未定(みてい) (undecided, TBD)

general

Added 2026.2.9 11:36 · Revised 2026.10.11 3:21

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