IPA: /ˈtrʌstiɪst/
KK: /ˈtrʌstiɪst/
The most reliable or dependable; the one you can trust the most.
He is my trustiest friend, always there when I need help.
Comparative: trustier
Superlative: trustiest
Trustiest → It is formed from "trust" (from Old Norse "traust", meaning confidence or reliance) and the suffix "-iest" (meaning most). The word "trustiest" means the most reliable or the one you can have the greatest confidence in.
Think of 'trust' as having confidence in someone, and '-iest' means the most. So, when you say someone is the trustiest, you mean they are the one you can have the most confidence in.
No commonly confused words.