impervium
An impervious substanceAn impervious substance.
Meaning
1 senses(uncountable)An impervious substance.
Origin
From impervious + -ium.From impervious + -ium.
Wiktionary, CC BY-SA 4.0 · source
Lessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable