IPA: /ɪnˈflæməblnəs/
KK: /ɪnˈflæməblnəs/
The quality or state of being able to catch fire easily.
The inflammableness of the material made it dangerous to use near open flames.
Inflammableness → It is formed from "in-" (meaning not), "flammare" (meaning to set on fire), and "-ness" (meaning the state of). The word refers to the state of being capable of being set on fire or easily ignited.
Think of the word 'flammare' which means to set on fire, and remember that 'inflammableness' describes the state of being easily ignited.