The opposite of the word "suspect" is "trust" or "believe".
Its καχυποψία (kachipopsia) (n.)
A synonym that has a meaning similar to the word believes is the word trust. An antonym to the word believes that has an opposite meaning of it is the word doubt.
The opposite of doubt is certainty. The opposite of a doubt about a person could be trust.
confident , trust, faith
The opposite of confident is diffident. The prefix is dif-, a variation of de-. The root word is -fident, related to "fidelity", "bona fides", "fiduciary" and other similar words having to do with trust. Unconfident also fits.
The opposite could be distrust, or mistrust, or suspicion.
what word is opposite of prudent
The opposite of anything is it's absence. Silence would be the opposite of a word spoken.
Opposite word of light
There is no opposite to cobble.
The word 'surf' does not have a opposite word.