The correct spelling of the word "dwindl" is actually "dwindle." The addition of the "e" at the end of the word helps to indicate the correct pronunciation of the word. Using the International Phonetic Alphabet (IPA), the transcription for "dwindle" is /ˈdwɪndəl/, with the stress on the first syllable. The "w" sound is represented by the IPA symbol /w/, and the "l" at the end is a voiceless alveolar lateral consonant represented by the symbol /l/.
The word "dwindl", spelled as "dwindle" in its complete form, is derived from Middle English. Its etymology can be traced back to the Old English word "dwīnan" or "dwindan", which meant "to waste away" or "to shrivel". This Old English term is believed to originate from the Proto-Germanic word "dwīnaną", meaning "to decrease" or "to fade", and is also related to the Old Norse word "dvinna", meaning "to dwindle" or "to disappear". Ultimately, the word "dwindle" has its roots in the Proto-Indo-European base "dheu", which conveys the idea of "to die" or "to vanish".