The correct spelling of the word is actually "Execution," with the IPA phonetic transcription of /ˌɛk.səˈkjuː.ʃən/. It is composed of six letters and three syllables, with the second syllable stressed. The word refers to the act of carrying out a plan or decision, especially one that involves killing or punishing someone. The misspelling "Exection" could be a result of a typographical error or lack of familiarity with the correct spelling of the word.