Answer: impedance

AnswerCrossword Clue
IMPEDANCEObstacle
IMPEDANCEZ stands for it in electronics
impedancesomething that impedes; an obstacle or hindrance
impedancethe total opposition to alternating current by an electric circuit, equal to the square root of the sum of the squares of the resistance and reactance of the circuit and usually expressed in ohms. Symbol: Z
impedancethe ratio of the force on a system undergoing simple harmonic motion to the velocity of the particles in the system
impedancethe measurement, in ohms, of opposition to an alternating current