IPA: /ˈɡɪltiɪst/
KK: /ˈɡɪltiɪst/
The most responsible for a wrongdoing or crime; feeling or showing guilt more than others.
After the investigation, he was found to be the guiltiest of all the suspects.
Comparative: guiltier
Superlative: guiltiest
Guiltiest → It is formed from "guilt" (from Old English "gylt", meaning a crime or sin) and the suffix "-iest" (meaning most). The word "guiltiest" means having the most guilt or being the most culpable.
Think of 'guilt' as a feeling of responsibility for a wrongdoing, and remember that 'guiltiest' means having the most of that feeling.
No commonly confused words.