Which word was selected as Merriam-Webster ‘Word of the Year’ 2021?

A. Virus
B. Vaccine
C. Lockdown
D. Covid

Explanation:

‘Vaccine’ is the word of the year 2021of Merriam-Webster, America’s most trusted online dictionary.
The terms vaccine & vaccination are derived from Variolae vaccinae (smallpox of the cow), the term devised by Edward Jenner & he coined the word vaccine from the Latin word ‘vacca’ for cow.