human
以下の文章で一番長い単語はどれですか？意味と合わせて教えてください。

When one door of happiness closes, another opens, but often we look so long in disappointment and bitterness at the closed door that we do not expectantly look for and therefore see with pleasure and gratitude the one which has been opened for us.
gpt
与えられた文の中で一番長い単語は「disappointment」になります。

その意味は、失望、失意、落胆です。