The word "TCTAC" is a combination of five letters that can be spelled using the International Phonetic Alphabet (IPA) phonetic transcription. The letter "T" is pronounced as /ti/, the letter "C" is pronounced as /si/, and the letter "A" is pronounced as /eɪ/. The word also includes the letter "C" pronounced as /si/ again, and ends with the letter "T" pronounced as /ti/. Despite the combination of these letters, "TCTAC" lacks meaning as a random sequence of letters.