1- The word "Energy" is understandable to educated Tajik audience as it is, but the letter "g" is pronounced "j" like in the words 'je','jour' and 'jusque' in French.
2- The other (Persian-based) equivalent for "energy" is "Niru". The "u" is pronounced like the one in "Uma" and "oo" in 'food, zoom, doom, loom'.
3- If by 'eneregy' you mean something like 'fossil fuel' here:
Then the word for "fuel" would be "Sukht". It is the same rhyme and pronounciation like "Sucht" in German, but 's' is pronounced like in 'seek', 'some' and 'sick' in English.
I don't have Cyrillic alphabets software for Tajik, so can't type it here for you. Here are a list of languages which use Cyrillic alphabets, e.g. Russian and Ukrainian. If you find a translator/ typist of any of these, s/he'll type the word in Tajik for you:
Abaza, Abkhaz, Adyghe, Avar, Azeri, Belarusian, Bulgarian, Dungan, Kazak, Kyrghyz, Komi, Macedonian, Moldovan, Mongolian, Russian, Serbian, Slovio, Tajik, Tatar, Turkmen, Ukranian, Uzbek, Yakut
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