The spelling of the phrase "more hearkening" can be broken down phonetically using the International Phonetic Alphabet (IPA) as /mɔr ˈhɑrkənɪŋ/. The first syllable is pronounced with an open "o" sound, followed by a strong "r" sound. The second syllable begins with a soft "h" sound and ends with a short "i" sound. The final syllable is pronounced with the stressed "ing" sound and a slight emphasis on the second syllable. This phrase is often used to urge someone to listen more attentively or closely.
"Mores", from which "more" is derived, comes from the Old English word "māra", meaning greater or additional. "Hearkening" comes from the Old English word "hercnian", meaning to listen or pay attention. The combination "more hearkening" is not a standard English phrase or word, so it does not possess any specific etymology.