Which new words have been added to Merriam-Webster dictionary?

Merriam-Webster has added 1,400 new words and definitions, including 'looksmaxxing' for efforts to enhance physical attractiveness and 'Sunday scaries' to describe anxiety and sadness as the weekend ends. 'Cuffing season' was also added for when single people seek short-term romantic partners to spend the colder months with. 'Copium', 'California sober' and 'uncanny valley' are some other words.