noun
total loss; complete loss
Refers to a situation where everything is lost, often used in financial or business contexts. Colloquial and somewhat emphatic.
投資したお金が丸損になった。
The money I invested became a total loss.
この取引は丸損で終わった。
This deal ended in a complete loss.
Compound of 丸 (まる, 'whole, complete') and 損 (ぞん, 'loss, damage'). The reading ぞん for 損 is a voiced variant often seen in compounds.