12 letters · 17 points in Scrabble
noun a policy of intervening in the affairs of other countries
noun the act of hindering or obstructing or impeding
noun electrical or acoustic activity that can disturb communication
originFrom interfere + -ence. The sense in physics was likely introduced by English polymath Thomas Young, which he used as early as 1801 in a paper in the Philosophical Transactions of the Royal Society.
Etymology from Wiktionary, CC BY-SA 3.0