What does 楽観 mean?
楽観 is a Japanese noun meaning “optimism” in English. It is written as 楽観 in kanji, らっかん in hiragana, and rakkan in romaji. This word is part of JLPT N1 vocabulary.
Example sentence
父は私の楽観を乱さないことにした。
My father chose not to disturb my optimism.