noun, noun or participle which takes 'suru', intransitive verb
sharp rise; marked increase; conspicuous growth
Formal or literary term for a noticeable, often sudden increase in numbers, amounts, or scale. Commonly used in economic, statistical, or business contexts.
今年度の売上高は著増した。
This fiscal year's sales increased markedly.
感染者数の著増が報告された。
A sharp rise in the number of infected people was reported.