The word "Gainpain" is spelled as /ɡeɪnpeɪn/. The first syllable is pronounced with the long 'a' sound, represented by the phonetic symbol /eɪ/. The second syllable is pronounced with the short 'e' sound, represented by the symbol /e/. The word refers to a specific type of pain, and it is important to spell it correctly as misspelling might have serious consequences. Therefore, it is crucial to learn and memorize the correct IPA transcription of the word "Gainpain."