Chū-jiân hoat-hóe
Chū-jiân hoat-hóe (自然發火), iā hō-chò chū-jiân (自燃), sī khó-jiân bu̍t-chit tī bô gōa-pō͘ hóe-chheⁿ ia̍h-sī hóe-sái téng-téng hòe-goân chò-iōng ê chōng-hóng hā, in-ūi siū-jia̍t ia̍h-sī chū-sin hoat-jia̍t lâi chō-sêng chū-jiân ê jiân-sio. Bu̍t-chit ê un-tō͘ nā chhiau-kòe hoat-hóe-tiám, chiū chin ū khó-lêng chū-jiân hoat-hóe.