By omitting from special relativity the luminiferous aether, Einstein stated that time dilation and length contraction measured in an object in relative motion is inertial—that is, the object exhibits constant velocity, which is speed with direction, when measured by its observer.
Dǎɣ awinan tila dǎɣ talɣiwen karoznen ən éther luminifereu, Einstein iliɣat as asihraw ən azaman əd təmɣinanen zagrotnen ən ikatnen dǎɣ harat ən ewalawal olahan aqalnen awinan ider – atamosan as harat isakna urmad winan itimutuy, atamosan urmad dər təsigwen, agud wadaqalnat aykatan fal amanhay ənes.