The word Trepaned is misspelled against Trepanned, which is past tense of "Trepan"
-->
Trepanned has double "nn" is mispronounced as "n"
Remember double 'NN' in between the strings trepa & ed which should not be misspelled with single 'N'
Wrong Spelling: trepa-n-ed
Correct Spelling: trepa-nn-ed
Explore spell check of Trepanned to spell without errors.