Sentence:  “It's a long time since I tasted such a borshtch! Simply a vivifier! It melts in every limb!”" he kept <WSD>rhapsodizing</WSD>, between mouthfuls. “It ought to be sent to the Chicago Exposition. The "missess" would get a medal.” 
Meaning of the word marked with <WSD> tags:  To say (something) with exaggerated or rapturous enthusiasm.