Correct spelling for the English word "more energyless" is [mˈɔːɹ ˈɛnəd͡ʒɪləs], [mˈɔːɹ ˈɛnədʒɪləs], [m_ˈɔː_ɹ ˈɛ_n_ə_dʒ_ɪ_l_ə_s] (IPA phonetic alphabet).
The term "more energyless" does not have a specific etymology as it is not a commonly used or recognized word. In fact, "more energyless" is a combination of two words - "more" and "energyless" - and it appears to be a phrase created by simply adding the word "more" as a modifier to the adjective "energyless".
The word "energyless" refers to a lack or absence of energy, which can be traced back to the root word "energy". "Energy" ultimately derives from the Greek word "energeia", meaning "activity" or "operation". It entered the English language in the mid-16th century through the Latin word "energia", which used the same Greek root.
When it comes to the compound word "more energyless", it follows the general rules of English word formation by combining two existing words to create a new meaning.