The word Imemorially is misspelled against Immemorially, an adverb meaning "Beyond memory."
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Immemorially has double "mm" is mispronounced as "m"
Remember double 'MM' in between the strings i & emorially which should not be misspelled with single 'M'
Wrong Spelling:  i-m-emorially 
Correct Spelling:  i-mm-emorially 
Find more incorrect spellings of Immemorially to spell right way.