3. To fare well; to have success; to prosper. Save london, and send true lawyers their meed! For whoso wants money with them shall not speed! (Lydgate) I told ye then he should prevail, and speed On his bad errand. (milton)
5. To be expedient.
Origin: AS. Spdan, fr. Spd, n.; akin to D. Spoeden, G. Sich sputen. See Speed.
In kinematics, speedis sometimes used to denote the amount of velocity without regard to direction of motion, while velocity is not regarded as known unless both the direction and the amount are known.
3. One who, or that which, causes or promotes speed or success. Hercules be thy speed! god speed, Good speed; prosperity. See Godspeed. Speed gauge, Speed indicator, and Speed recorder, a power lathe with a rapidly revolving spindle, for turning small objects, for polishing, etc.; a hand lathe. Speed pulley, a cone pulley with steps.
Origin: AS. Spd success, swiftness, from spwan to succeed; akin to D. Spoedd, OHG. Spuot success, spuot to succees, Skr. Spha to increase, grow fat. B.