One of the mysteries of the English language finally explained.
Early 19th century. From written Ottoman Turkish rāhatülhulkūm (colloquial rāhat-ı lokum) from colloquial Arabic rāḥat al-ḥalqūm throat's ease from rāḥat-, rāḥa ease + al, definite article + ḥalqūm, variant of classical Arabic ḥulqūm throat.
rahat lokum/ˌrɑːhat lɒˈkuːm/
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