10 letters · 18 points in Scrabble
adjective able to resist the explosive force of bombs and shells
originEtymology tree Proto-Indo-European *(s)kelH- Proto-Indo-European *skolH-yeh₂ Proto-Germanic *skaljō Proto-West Germanic *skallju Old English sċiell Middle English schelle English shell English -proof English shellproof From shell + -proof.
Etymology from Wiktionary, CC BY-SA 3.0