The correct spelling of the word "recoilatom" is /riːˈkɔɪlətɒm/. It is formed by combining two words, "recoil" and "atom". The first part, "recoil", means to spring back or recoil, and is pronounced /rɪˈkɔɪl/. The second part, "atom", refers to the smallest particle of an element and is pronounced /ˈætəm/. When the two parts are combined, the stress falls on the second syllable, making it /-lətɒm/. The spelling of the word reflects its pronunciation using the International Phonetic Alphabet (IPA).