This is the 345th most frequent Armenian word.
մինչեւ
"Մինչեւ" means "until" or "up to" in English.
The word 'մինչեւ' here is used as a conjunction to indicate the endpoint of a duration of time.
Ես աշխատում եմ մինչեւ ուշ գիշեր։
I work until late night.
The word 'մինչեւ' here is used as a preposition to indicate the destination or the endpoint of a movement.
Նա գնաց մինչեւ խանութ։
He/she went up to the store.
The word 'մինչեւ' here is used as a conjunction to specify the condition time until which the action should be carried out.