մինչեւ

In a sentence

• Ես աշխատում եմ մինչեւ ուշ գիշեր։

  I work until late night.

  The word 'մինչեւ' here is used as a conjunction to indicate the endpoint of a duration of time.

• Նա գնաց մինչեւ խանութ։

  He/she went up to the store.

  The word 'մինչեւ' here is used as a preposition to indicate the destination or the endpoint of a movement.

• Սպասիր մինչեւ ես վերադառնամ։

  Wait until I come back.

  The word 'մինչեւ' here is used as a conjunction to specify the condition time until which the action should be carried out.