[in.com.bus.ti.ble] adj [ME, prob. fr. MF, fr. in- + combustible combustible] (15c): not combustible: incapable of being burned -- in.com.bus.ti.bil.i.ty n -- incombustible n
INCOMBUSTIBLE
Meaning of INCOMBUSTIBLE in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012