The word "more inexterminable" may look intimidating, but it can be broken down phonetically. The first syllable "more" is pronounced as /mɔːr/ with the long "o" sound. The second syllable "in" is pronounced as /ɪn/. The third, fourth, and fifth syllables "ex-ter-min" are pronounced as /ɪkˈstɜːmɪn/, with the stress on the middle syllable "ter". The final syllable "able" is pronounced as /əbl/. Therefore, the whole word is pronounced as /mɔːr ɪnɪkˈstɜːmɪnəbl/. It means something that cannot be destroyed or eliminated.
The word "inexterminable" is a rare adjective that does not have a commonly accepted etymology. It is likely a combination of the prefix "in-" which indicates negation or opposite, and "exterminable", derived from the verb "exterminate".
"Exterminate" comes from the Latin word "exterminare" meaning "destroy" or "drive away". It is a combination of "ex-" which means "out" or "away", and "terminus" meaning "boundary" or "limit". Therefore, "exterminable" refers to something that can be destroyed or eliminated.
The prefix "in-" added to "exterminable" negates its meaning, giving the idea of something that cannot be destroyed or eliminated. Hence, "inexterminable" means essentially "unable to be exterminated".