The spelling of the word "cothern" can be explained with the IPA phonetic transcription. Cothern is pronounced as /kɒðəːn/ in IPA symbols. The first letter 'c' is pronounced as a hard 'k' sound, followed by the 'o' sound as in 'hot'. The 'th' sound in Cothern is pronounced with a soft 'th' as in 'then' and 'ə' is pronounced as a schwa sound. Lastly, the word ends with an 'n' sound. Thus, the spelling and pronunciation of Cothern can be represented with IPA transcription.