The correct spelling for "de marks" is actually "demarcation". Demarcation refers to the act of setting boundaries or limits between two entities or territories. In IPA phonetic transcription, this word is pronounced as /diːmɑːkˈeɪʃən/. The stressed syllables are "di" and "kay," while the schwa sound occurs twice between the stressed syllables. Proper spelling is important to clearly convey the intended meaning of a word, and can help avoid confusion or misunderstandings.