“Aptness” in Japanese
Short answer
Aptness in Japanese is “適性” (tekisei). Full meaning: aptitude, aptness, suitability.
Other ways to say “Aptness” in Japanese
剴切
gaisetsu appropriateness, adequacy, aptness, relevance
凱切
gaisetsu appropriateness, adequacy, aptness, relevance
がいせつ
gaisetsu appropriateness, adequacy, aptness, relevance
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