Mistrust (noun)

1. A lack of trust or confidence in someone or something.
2. A suspicion or doubt about the honesty, reliability, or integrity of someone or something.
3. A feeling of wariness or distrust towards someone or something.
4. A belief or attitude that someone or something is not trustworthy or credible.
5. A lack of faith or belief in someone or something.

Origin:

From the phrase 'mis-trust', meaning 'to trust wrongly or inaccurately'.

Examples:

1. Her previous experiences with unreliable contractors led to a deep-seated mistrust of all service providers.
2. His mistrust of the government and its institutions was a major reason for his political activism.
3. Her mistrust of her partner's promises and commitments caused a lot of stress and tension in their relationship.
4. Their mistrust of each other's motives and intentions was a major barrier to cooperation and collaboration.
5. His mistrust of the new technology was rooted in his lack of understanding of how it works.