Learn how to say Metathetic correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word metathesis:
noun (plural metatheses /-siːz/)
1 [mass noun] Grammar the transposition of sounds or letters in a word:
he attributes the metathesis of the last two sounds to the Creole tendency to end words with a vowel
2 (also metathesis reaction) Chemistryanother term for double decomposition.
late 16th century: from Greek, from metatithenai ‘transpose, change the position of’