Thradbare or Threadbare: How To spell?

The word Thradbare is misspelled against Threadbare, an adjective meaning "Fig.: Worn out; as, a threadbare subject; stale topics and threadbare quotations."

Threadbare has vowels 'ea' together mispronounced as 'a'
Word contains consecutive vowels 'EA' in between alphabets thr & dbare is misspelled as 'A'
Wrong Spelling:  thr-a-dbare 
Correct Spelling:  thr-ea-dbare 
Explore spell check of Threadbare to spell without errors.

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