This is the 509th most frequent Armenian word.
մեկ
The Armenian word "մեկ" means "one" in English.
Here, "մեկը" means "someone" and indicates an unspecified person.
Մեկը դուռը բախեց։
Someone knocked on the door.
In this sentence, "մեկ" signifies the number one, denoting a single pen was available.
Ես ունեմ միայն մեկ գրիչ։
I have only one pen.
Here, "մեկ" is used as "one" to specify a singular difference.