westing

/W EH1 S T IH0 NG/
verb
  1. 1

    To move to the west; (of the sun) to set.

noun
  1. 1

    A distance west of a datum line on a map or chart.

  2. 2

    A distance travelled westward.

Source: https://en.wiktionary.org/wiki/west, https://en.wiktionary.org/wiki/westing