C1 level words of daily use

To make something less severe or serious

• Alleviate

• Poverty

• Stressful

• Heaven

To try hard to do something; an attempt.

• Conundrum

• Eistein

• Hiking

• Endeavor

To spread or distribute information widely

• Disseminate

• Like

• Inform

• Dissimanate

To convince someone to do or believe something

• Believe

• Persuade

• Play videogames

• Do

To say something again or a number of times for emphasis

• Understand

• Collaborate

• Make

• Reiterate

To work together with others to achieve a common goal

• Collaborate

• Work

• Research

• Thrive

To improve something by making small changes

• Refine

• Abstrain

• Abstain

• Tesla

To be fair and just

• Cook

• Judge

• Impartial

• Friendly