The word Lethed is misspelled against Letheed, an adjective meaning "Caused by Lethe."
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Letheed has double "ee" is mispronounced as "e"
Remember double 'EE' in between the strings Leth & d which should not be misspelled with single 'E'
Wrong Spelling:  Leth-e-d 
Correct Spelling:  Leth-ee-d 
Explore spell check of Letheed to spell without errors.