The word Anex is misspelled against Annex, meaning "To add or affix at the end."
-->
Annex has double "nn" is mispronounced as "n"
Remember double 'NN' in between the strings a & ex which should not be misspelled with single 'N'
Wrong Spelling:  a-n-ex 
Correct Spelling:  a-nn-ex 
Explore spell check of Annex to spell without errors.