| ̷ ̷(ˌ) ̷ ̷|məs ə nt adjective
Etymology: Latin intumescent-, intumescens, present participle of intumescere
1. : marked by intumescence : swelling, enlarging, or bubbling up
2. of paint : swelling and charring when exposed to flame and forming an insulating fire-retardant barrier between the flame and the coated material