Properly "naphtha," as it is both in the LXX. and the Vulgate, as well as in the Peshito-Syriac. Pliny mentions naphtha as a product of Babylonia, similar in appearance to liquid bitumen, and having a remarkable affinity to fire.
ROSIN
Meaning of ROSIN in English
Smith's Bible English dictionary. Английский библейский словарь Смита. 2012