Spontaneity is acting freely on the impulse of the moment. Lose your spontaneity, a moment of spontaneity, admire her spontaneity.
It is prized in art and in company and is very hard to arrange, which is the joke inside every rehearsed spontaneous moment on television. Note the spelling: it is spontaneity rather than spontaneousness, which is a form almost nobody uses.
1nounspontaneityActing freely on the impulse of the moment.
“Their trip had no plan at all, and that spontaneity was what made it so much fun.”
spontaneity is a quality.
Latin spontaneus means voluntary, from sponte, of one's own accord.
Latin
spontaneus — voluntary
English, today
spontaneity
From Latin spontaneus (“voluntary”). by surface analysis, spont(aneous) + -aneity. Compare French spontanéité.
Etymology from Wiktionary, CC BY-SA