The quality or state of being caustic; the degree to which something is chemically corrosive or verbally harsh and biting.
From Latin causticus (Greek kaustikos, 'burning') plus the suffix -ity, which forms abstract nouns indicating degree or intensity. This follows the same pattern as 'acidity' or 'toxicity.'
Causticity perfectly shows how chemistry and human behavior share metaphors—we measure the literal burning power of acids and the figurative 'burning' power of harsh words using almost identical vocabulary.
Complete word intelligence in one call. Free tier — 50 lookups/day.