Impeding Force That Slows a Supersonic Aircraft

This page is the CodyCross answer for the clue below from Café, Group 1325, Puzzle 4 (Meeting Friends).

Question is: Impeding Force That Slows a Supersonic Aircraft

and the answer is: WAVEDRAG

Word Meaning:

WAVE DRAG — (aerodynamics) Drag resulting from shock wave formation at transonic and supersonic speeds.

Definitions from Wiktionary.