がっかりな（がっかりな、gaっkarina）
- disappointing

The Japanese word がっかりながっかりな means "disappointed," "discouraged," or "let down." It describes a feeling of sadness or dissatisfaction caused by something not meeting expectations. It's an adjective, specifically a "na-adjective" (also known as a "nominal adjective" or "adjectival noun"), which means it behaves like a noun in some ways and requires the particle なな when modifying another noun. It primarily conveys a sense of feeling let down or disheartened.

⚫︎ 試験の結果に、がっかりな気持ちになった。 Translation: I felt disappointed with the exam results. ⚫︎ 雨でピクニックが中止になり、がっかりな気分だった。 Translation: I was in a disappointed mood because the picnic was canceled due to rain. ⚫︎ 彼の無責任な態度に、彼女はがっかりな様子だった。 Translation: She looked disappointed at his irresponsible attitude.

⚫︎ Use がっかりながっかりな when you want to express disappointment or discouragement. ⚫︎ It is often used to describe how someone feels about a situation, event, or person. ⚫︎ Since it's a "na-adjective", when modifying a noun, you must use it in the form of がっかりながっかりな + noun. For example, がっかりながっかりな態度（attitude）. ⚫︎ To say "I am disappointed," you would typically use a form of the verb がっかりする (to be disappointed) such as がっかりしました (I was disappointed) or がっかりしています (I am disappointed/feel disappointed).

⚫︎ がっかりながっかりな is written in hiragana. ⚫︎ The base form is がっかり. ⚫︎ The "na" (な) is required when modifying a noun. ⚫︎ The verb form is がっかりする (to be disappointed).

⚫︎ 落胆（らつたん）した (rattsan shita): disappointed, discouraged (more formal) ⚫︎ 失望（しつぼう）した (shitsubou shita): disappointed, lost hope (stronger) ⚫︎ 残念（ざんねん）な (zannen na): regrettable, unfortunate (can also imply disappointment)

⚫︎ 嬉しい（うれしい） (ureshii): happy, glad ⚫︎ 喜（よろこ）ばしい (yorokobashii): pleasing, delightful ⚫︎ 満足（まんぞく）な (manzoku na): satisfied

試合に負けて、がっかりな気持ちになった。 ・Translation: I felt disappointed after losing the game. ・Explanation: This sentence uses がっかりながっかりな to describe the feeling of disappointment after a sports match.

プレゼントをもらえなくて、がっかりな子供の顔を見た。 ・Translation: I saw the disappointed face of a child because they didn't get a present. ・Explanation: This sentence describes the appearance of a disappointed child, using がっかりながっかりな to modify the noun "face".

The word がっかり is an onomatopoeia, representing the sound or feeling of disappointment. It's a mimetic word, meant to mimic the sound or sensation associated with a feeling of being let down or losing hope, and the addition of なな makes it into a na-adjective.