He accidentally held her hand.

I'm troubled by his unproductive attitude.

He was affected by secondary effects.

This is a preliminary plan.

Thinking sensibly, that plan will not succeed.

He is interested in diachronic linguistics studies.

He is interested in synchronic linguistics.

He is thought to be a very unsociable person.

UNESCO is an international organization that promotes the development of education, science, and culture around the world.

He felt cognitive dissonance between his actions and beliefs.