impervium
/ɪmˈpəːvɪəm/Originally and chiefly Science Fiction
noun
A virtually impenetrable or indestructible substance.
- Frequently (and earliest) in attributive use..
Origin
1930s. From imperv- + -ium.
- master card
- Master Charge
- Mastercharge
- master chief petty officer
- masterclass
- master copy
- master craftsman
- master craftsmanship
- masterdom
- master equation
- masterer
- master eye
- master fault
- prawn and beer night
- prawn cocktail
- prawn cracker
- prawner
- prawning
- prawn-like
- prawn night
- prawn pink
- prawn pot
- prawny
- Praxean
- praxeological