indeterminable

That is incapable of being measured. / That is incapable of being ascertained.

Japanese Meaning

測定できない / 判断・確定できない

Because the pollutant had already dispersed, the exact level of contamination was indeterminable.

汚染物質はすでに拡散していたため、正確な汚染レベルは測定できなかった。

Sense（1）

That is incapable of being measured.

Sense（2）

That is incapable of being ascertained.

more indeterminable

（ comparative ）

most indeterminable

（ superlative ）