The spelling of the word "geller" can be explained through its phonetic transcription using International Phonetic Alphabet (IPA) symbols. The first sound, /ɡ/, represents the "g" consonant sound, followed by /ɛ/, which is the "e" sound. The following sound is the "l" consonant, represented by /l/. Finally, the last sound is /ər/, which represents the weak "uh" sound followed by the "r" sound. Therefore, the correct spelling of this word is "g-e-l-l-e-r."