What is the etymology of the word "Vasikin", used for the Minyan that starts Shemona Esrei at sunrise? Also, is "Vasikin" Hebrew or Aramaic?
Jastrow (page 375) on the word ותיק:
And then from Vatikin as a description of the men who did this -> the practice.
I think Mishnaic Hebrew, with a comparison to Arabic and Biblical Hebrew.