The spelling of the word "Riddick" can be explained using the International Phonetic Alphabet (IPA). To begin with, the letter "R" is pronounced as /r/ in the word, denoting a voiced alveolar trill. The double letter "D" is pronounced as a voiced dental plosive /d/, whereas the letter "I" is pronounced as a short /ɪ/, also known as the "short i" sound. The final letter "CK" is pronounced as a voiceless velar plosive, /k/. Altogether, the word "Riddick" is pronounced as /ˈrɪdɪk/.