Thrumed or Thrummed: How To spell?

The word Thrumed is misspelled against Thrummed, which is past tense of "Thrum"

--> Thrummed has double "mm" is mispronounced as "m"
Remember double 'MM' in between the strings thru & ed which should not be misspelled with single 'M'
Wrong Spelling:  thru-m-ed 
Correct Spelling:  thru-mm-ed 
Check more misspelled words of Thrummed to spell it correct.

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