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English - Japanese - inadequacy (名) 不十分; 不適当, 不適格; 無能; 不器用; 欠点

Dictionarist.com  Synonyms for inadequacy 1. shortcoming: deficiency, drawback, defect, shortage, flaw, lack, blemish 2. insecurity: inferiority, incompetence, failing, ineptitude, weakness, impotence