Learn how to say Treacly correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word treacle:
[mass noun] British
a thick, sticky dark syrup made from partly refined sugar; molasses.
Middle English (originally denoting an antidote against venom): from Old French triacle, via Latin from Greek thēriakē ‘antidote against venom’, feminine of thēriakos (adjective), from thērion ‘wild beast’. Current senses date from the late 17th century