Understod or Understood: How To spell?

The word Understod is misspelled against Understood, which is past tense of "Understand"

Understood has double "oo" is mispronounced as "o"
Remember double 'OO' in between the strings underst & d which should not be misspelled with single 'O'
Wrong Spelling: underst-o-d
Correct Spelling: underst-oo-d
Find more incorrect spellings of Understood to spell right way.