In a certain code language, 'candle main' is coded as 'fire blaze' and 'line candle' is coded as 'number fire'. What is the code word for 'main'?

Let's isolate the words and codes by comparison:'candle main' $\to$ 'fire blaze''line candle' $\to$ 'number fire'From statements 1 and 2, the common word is 'candle' and the common code is 'fire'.Therefore, 'candle' = 'fire'.Looking back at statement 1, since 'candle' is coded as 'fire', the remaining word 'main' must be coded as the remaining code word, which is 'blaze'.