outset

Etymology 1

From out- + set, replacing earlier outsetting.

noun

1. Onset; the beginning or initial stage of something.
   He agreed and understood from the outset, so don't bother explaining again.
   Six successive defeats had left them rooted to the bottom of the Premier League table but, clearly under instructions to attack from the outset, Bolton started far the brighter. October 15, 2011, Michael Da Silva, “Wigan 1 - 3 Bolton”, in BBC Sport

Etymology 2

From out- + set.

verb

1. (Internet, CSS, transitive) To cause (a design element) to extend around the outside of something else, the opposite of being inset.