In one episode, young Evan spontaneously breaks into a song about suicide.
If scrawny little Tutankhamun can do it, a badass like Khufu could probably cause them to spontaneously combust.
There is, as yet, no firm answer to the question of whether memories that spontaneously surface years after the fact can be true.
Devastated, she climbed with feral intensity, hoping the baby might spontaneously abort.
You've got to spontaneously volunteer positive perspectives on his or her life, without being asked to do so.
In her this appetite is developed much less often spontaneously than in him, and where it is so, it is generally later.
He did spontaneously the things that lesser men do at behest of their press-agents.
But it has been certainly proved that these organisms are not spontaneously produced in the water or organic fluid.
It spontaneously retracted into the lentil, like the horns of a snail.
It followed that everybody was reluctantly compelled to pay the higher price which the American spontaneously elected to give.
1650s, from Late Latin spontaneus "willing, of one's free will," from Latin (sua) sponte "of one's own accord, willingly;" of unknown origin. Related: Spontaneously. Earliest use is of persons and characters. Spontaneous combustion first attested 1795. Spontaneous generation (the phrase, not the event) attested from 1650s.