King Messiah - Melech haMashiach in Hebrew. Melech (MEL ekh) means king, and Mashiach (mah SHEE ahkh) means 'anointed'. The syllable ha means 'the'. In Hebrew, however, it appears as a prefix to the second word of an expression. Together in Hebrew, these words mean 'the king who has been anointed'. In the same vein, King David is called 'David the king' in Hebrew. Neither expression can be used literally in English.
I prefer to translate Melech haMashiach as 'King Messiah'. Sometimes I will write 'the Messianic King', but here this expression does not ring true enough to the Hebrew idea. Other Jewish kings were also anointed in the times of the Bible, but the laws from Maimonides teach us about the anticipated and greatest anointed king.
Not all Jewish kings have been anointed, though. Only monarchs who are descended from the patriarch Jacob's son Judah through his descendants Kings David and Solomon. In case of point, the Hasmonean kings – the Maccabees – were not anointed. They were Priests – descendants of the patriarch Jacob's son Levi. Since they were not anointed, G-d did not promise them that future kings would descend from them. Anointing reinforces the covenant that the descendants would continue the dynasty.
Greek speakers borrowed the Hebrew word Mashiach as 'Messiah', and this word was borrowed by Latin speakers until it came into the English language. Greek speakers are unable to pronounce /sh/.