Quiver
Part of speech: noun
Definition: A container for arrows, crossbow bolts or darts, such as those fired from a bow, crossbow or blowgun. A ready storage location for figurative tools or weapons. A container for arrows, crossbow bolts or darts, such as those fired from a bow, crossbow or blowgun. Shaking or moving with a slight trembling motion.
Part of speech: adjective
Definition: Nimble, active.
Part of speech: verb
Definition: To shake or move with slight and tremulous motion; to tremble; to quake; to shudder; to shiver.
Trembling
Part of speech: verb
Definition: To shake, quiver, or vibrate.
Example sentence: If somebody's pointing a trembling finger at your pants and saying you shouldn't be doing that, follow that finger back, go up the arm and look at the head that's behind it, because there's almost always something fairly woolly in there.