শুকনো ঘাসে আগুন নিজে থেকেই (স্বতঃস্ফূর্তভাবে) লেগে গিয়েছিল।
COLLOCATIONS
spontaneously combust, spontaneously generated, burst out spontaneously
WORD FORMSAdjective: spontaneous | Noun: spontaneityUSAGE NOTES
Used to describe actions that arise from internal desire or natural causes rather than external pressure or planning.