「発達 (はったつ)」 means development or growth, referring to the process of something becoming more advanced, mature, or capable over time. It's commonly used for children's physical or mental growth, technological advancements, or societal progress. For example: 子供の脳は急速に発達します。(A child's brain develops rapidly.)
物事が成長したり、能力などが進歩したりすること。心身や文化、科学技術などがより良い状態になることです。
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