不透明|ふとうめいfutoumei[2]nakadaka (mid-high)

1. na-adjectiveopaque; obscure; murky; turbid
2. nounopacity; obscurity
3. na-adjectiveunclear; unpredictable; uncertain

• Synonym不明瞭ふめいりょうNeutralWritten/formal prose. Vague or indistinct, esp. of expression or sound, as in 「発音が不明瞭」; it is about unclear expression, 「不透明」 about unpredictable prospects.
• Related不鮮明ふせんめいNeutralRefers mainly to blurred images and visuals, as in 「画像が不鮮明」; the focus is visual sharpness, while 「不透明」 leans toward opacity and uncertain outlooks.
• Related濁りにごりNeutralA noun for murkiness or cloudiness, typically of liquids, as in 「水の濁り」; it covers literal turbidity, not uncertain futures.
• RelatedおぼろげNeutralDescribes hazy memories or scenery, as in 「おぼろげな記憶」; it stresses vague impressions, and the kanji spelling 「朧気」 is literary.
• Antonym透明とうめいNeutralThe direct antonym: transparent and clear, the opposite of 「不透明」 in both light transmission and visibility.

Use 「不透明」 for what does not let light through or for prospects and processes you cannot see into, as in 「先行き不透明」 and 「不透明な経理」. For vague expression use 「不明瞭」, blurred images 「不鮮明」, hazy memories or scenery 「朧気」, murky liquids 「濁り」; 「透明」 is the antonym.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 透き通すきとおっていないこと。
2. 実情じつじょうや成り行なりゆきが見通みとおせないこと。