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How to say "Decline" in Japanese

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

Japanese Option A

衰える

おとろえる (otoroeru)
N2 / CEFR Syllabus
VS
Japanese Option B

萎靡

いび (ibi)
N1 / CEFR Syllabus

Nuance Contrast & Translation Difference

When translating "decline" into Japanese, you must choose carefully between 衰える and 萎靡. In Japanese, 衰える (おとろえる (otoroeru)) is typically associated with "to decline, to become weak, to deteriorate" (Syllabus Level: N2) and represents Describes a gradual loss of strength, ability, health, or influence over time. 人や物の勢い、能力、機能などがだんだん弱くなる状態。. On the other hand, 萎靡 (いび (ibi)) maps to "decline, decay, languor, enervation, stagnation" (Syllabus Level: N1) and represents Often describes the state of something. A literal translation of "decline" can often sound unnatural to native Japanese speakers if mixed up!
Bilingual Context for "衰える"
年を取ると、体力はだんだん衰える。
As you get older, your physical strength gradually declines.
Bilingual Context for "萎靡"
組織の士気が萎靡している。
The morale of the organization is declining.

Nuance Mastery Quiz

Which Japanese word perfectly fits this blank space?

Fill in the blank: "年を取ると、体力はだんだん ___ 。" (Meaning: "As you get older, your physical strength gradually declines.")
🎉 Correct Answer!

Remember: "衰える" fits here because it means "to decline, to become weak, to deteriorate" in the context of: "As you get older, your physical strength gradually declines.". "萎靡" represents "decline, decay, languor, enervation, stagnation".

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