'lightwood' is a compound word in English, formed from 'light' (meaning 'not heavy' or 'easily ignited') and 'wood' (meaning 'the hard substance of trees').

'lightwood' was formed in English by combining 'light' and 'wood' to describe wood that is light in weight or easily ignited, especially pine wood rich in resin.

Initially, it referred to any wood that was light in weight, but over time it came to specifically mean resinous pine wood used for kindling.