larger pieces of cut wood, often used as firewood but also for building
用法筆記
Uncountable noun — use 'a piece of firewood' or 'a log of firewood' to refer to a single item. 'A cord of firewood' is a standard measurement (a stack 4 ft × 4 ft × 8 ft).
常見錯誤
I burned a firewood
I burned some firewood
firewood is uncountable and does not take 'a' directly.