The word "ESLTHI" does not appear to have a standardized meaning or spelling in English. However, based on its written form, we can use IPA phonetic transcription to break down the way the word is constructed. The word contains the consonants /ɛ/, /s/, /l/, /θ/ and /i/. These sounds are pronounced as follows: /ɛ/ = the "e" sound as in "bed" /s/ = the "s" sound as in "see" /l/ = the "l" sound as in "love" /θ/ = the "th" sound as in "thin" /i/ = the "ee" sound as in "meet".