Early Assamese নভৈলে (nobhoile) থেকে প্রাপ্ত, which is ন- (no-, “not”) + ভ (bho, “be, happen”) + -ইলে (-ile, “conditional participle”)। In Assamese it can be broken as ন (no) + হ (ho) + -ইলে (-ile)।
নহ’লে