The spelling of the word "finks on" might seem unusual, but it can be explained through phonetic transcription. The first syllable "finks" is pronounced as /fɪŋks/, with a voiced "f" sound and a nasal "ng" sound. The second syllable "on" is pronounced as /ɑn/, with an open back vowel. Together, the word refers to someone who informs or betrays others. While the spelling may be uncommon, understanding the underlying phonetics can help with pronunciation and comprehension.