1.
forgetfulness
the tendency to forget things, often due to age, distraction, or poor memory
Related Words
Compare:
ど忘れ (momentary memory lapse)
Related:
うっかり忘れ (careless forgetfulness)
Related:
記憶力 (memory capacity)
Compare:
記憶違い (faulty memory)
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度忘れ (sudden memory lapse)
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アルツハイマー (Alzheimer's (disease))