to disappear, to vanish, (of a fire or light) to go out / to die

細い: thin, narrow

火退, 逆焼, 野火, 燹: a backburn: a controlled fire deliberately set in the path of a wildfire to create a firebreak by removing combustible material

confirmation

confirm, make sure, check, verify

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend

he; boyfriend

fire / a flame / cooking fire / a firestarter / sparks / light (matches or lighter)

a backburn: a controlled fire deliberately set in the path of a wildfire to create a firebreak by removing combustible material