verb
plummet
PLUM-it/ˈplʌmɪt/
To fall rapidly and steeply.
A loose stone plummets from the edge of the cliff.

Etymology
A plummet was a small lead weight used on a line to measure depth. The verb shifted from taking such soundings to falling rapidly, evoking the downward movement of that weight.
In context
forgetting how dangerous this is and allowing himself to fly too high because if he does that the sun will melt the beeswax that hold these Wings together and you'll plummet and fall
More examples
- The damaged aircraft plummets toward the ground.
- Sales plummeted when the product was recalled.
- She watches the stone plummet into the ravine.
Forms
plummet · plummets · plummeted · plummeting