enormous expenditure; huge cost
Refers to a very large amount of money spent, often in public works, projects, or investments. Formal and somewhat literary.
その計画には巨費が投じられた。
An enormous amount of money was invested in the project.
巨費をかけて建設されたダム
A dam built at huge expense.
Compound of 巨 (huge) and 費 (expense). The reading is on'yomi.