IPA: /ˈɒnɪstɪst/
KK: /ˈɑnɪstɪst/
The highest degree of being truthful and sincere, without deceit or fraud.
She is the honestest person I know, always telling the truth even when it's difficult.
Comparative: honester
Superlative: honestest
Honestest is formed from "honest" (from Latin "honestus", meaning honorable or respectable) and the superlative suffix "-est" (meaning most). The word "honestest" means the most honest or the highest degree of honesty.
Think of 'honest' meaning honorable, and when you add '-est', it indicates the highest level of that quality — so 'honestest' means the most honorable.
No commonly confused words.