noun, noun which may take the genitive case particle 'no'
tens of thousands; several tens of thousands
Refers to an approximate number in the range of tens of thousands (roughly 20,000–90,000). Often used with の to modify a noun.
会場には数万人の観客が集まった。
Tens of thousands of spectators gathered at the venue.
このプロジェクトには数万円の費用がかかる。
This project will cost tens of thousands of yen.
Compound of 数 (すう, 'several') and 万 (まん, 'ten thousand').