The word "leadenly" is spelled with the root word "lead" and the suffix "-enly," which turns it into an adverb. The pronunciation of "leadenly" is [led-n-lee], with stress on the first syllable. The 'a' in lead is pronounced as a long 'e' sound [led] and the '-enly' suffix is pronounced as [n-lee]. The word means something that is done slowly and heavily, usually in a way that is burdensome or difficult.