lively person, sprightly fellow, live wire
spermatozoon, sperm cell, sperm
visibly pulsing temple artery, throbbing vein on the temple
nervous twitch of the eyelid, eyelid tic
live bait fish, baitfish
quicksilver, mercury
Свет, пульсировавший в темноте, шёл от маяка.
The light pulsing in the darkness came from a lighthouse.