3年後の単語数 = 8000 × 1.157625 = <<8000*1.157625=9261>>9,261語

Thu, 30 Apr 2026 13:24:17 +0000

# Why Understanding Word Growth Over Time Matters: The Case of 8,000 → 9,261 Words in 3 Years Language and vocabulary are living systems—constantly evolving, expanding, and deepening. For learners, writers, educators, and professionals, tracking how word knowledge grows over time can unlock powerful insights into cognitive development, communication effectiveness, and lifelong learning. This article explores one compelling example: how quantity of mastered words can rise from 8,000 to approximately 9,261 within just three years—a 15.7% increase—based on consistent growth at a rate of 1.157625% per month. ## The Power of Compound Vocabulary Growth Imagine starting with 8,000 words—a robust but achievable foundation in any major language. Now, project a steady monthly increase of about 1.16% over 36 months (3 years). When compounded consistently—just like interest in finance—this growth compounds on itself, leading to a final count of 9,261 words. While this may sound modest in absolute numbers, it reflects meaningful progress: fluent conversation, improved reading comprehension, sharper writing, and enhanced learning agility.