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Synonym Nuance VS

How to say "Be" in Japanese

Both words can translate to "be", but which should you choose?

Japanese Option A

失望する

しつぼうする (shitsubō suru)
N3 / CEFR Syllabus
VS
Japanese Option B

退屈する

たいくつする (taikutsu suru)
N3 / CEFR Syllabus

Nuance Contrast & Translation Difference

When translating "be" into Japanese, you must choose carefully between 失望する and 退屈する. In Japanese, 失望する (しつぼうする (shitsubō suru)) is typically associated with "to be disappointed; to lose hope" (Syllabus Level: N3) and represents 「失望する」は、期待していたことが叶わず、がっかりする気持ちを表します。人や結果に対して使われることが多いです。. On the other hand, 退屈する (たいくつする (taikutsu suru)) maps to "to be bored" (Syllabus Level: N3) and represents 動詞。興味がなく、時間を持て余す様子を表す。e.g., 授業に退屈する. A literal translation of "be" can often sound unnatural to native Japanese speakers if mixed up!
Bilingual Context for "失望する"
彼の裏切りにとても失望した。
I was very disappointed by his betrayal.
Bilingual Context for "退屈する"
することもなく、テレビを見ていたら退屈してきた。
Having nothing to do, I watched TV and got bored.

Nuance Mastery Quiz

Which Japanese word perfectly fits this blank space?

Fill in the blank: "彼の裏切りにとても失望した。" (Meaning: "I was very disappointed by his betrayal.")
🎉 Correct Answer!

Remember: "失望する" fits here because it means "to be disappointed; to lose hope" in the context of: "I was very disappointed by his betrayal.". "退屈する" represents "to be bored".

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