Geeco is not a familiar word for most people, but it can refer to a brand of home security devices. The spelling of this word can be explained using the International Phonetic Alphabet (IPA). The first sound is /dʒ/, which is a voiced palato-alveolar affricate. The second sound is /i/, which is a short, high front vowel. The final sound is /kəʊ/, which is a voiceless velar plosive followed by an unstressed vowel. Together, the sounds create the unique spelling of the word "geeco."