Strong and well-built enough to withstand the blast and impact of an exploding bomb.
From bomb + proof (Old French preuve, from Latin proba meaning 'tested'). The compound emerged in military engineering during WWI and WWII when bomb protection became critical.
Bombproof shelters scattered under cities like London and Berlin still exist today—silent witnesses to when ordinary citizens had to think about surviving explosions from above.
Complete word intelligence in one call. Free tier — 50 lookups/day.