an enemy / revenge, vengeance / opponent (of the game or conflict) / (archaic, obsolete) marriage partner

enemy / foe

airspace incursion; airspace violation

to violate airspace

trespassing (entering someone else's property illegally)

a machine, a device; a contraption / a loom / an opportunity, a chance to do something; the right time or moment / something of great importance: the linchpin of the matter

indicates aircraft / indicates paper aeroplanes / indicates lives in video games

indicates machines / indicates airplanes

a trap or snare that works by beheading the bird or beast caught in it

manipulation (as in a device) / manipulation (as in a person): deception, taking someone in / getting on someone's right side; humoring someone; an effort to please someone