Spontaneous

from Late Latin spontaneus, from Latin sponte (sua) (“of one's free will, voluntarily”).

Pronunciation Rhymes: -eɪniəs

Adjective

Self generated; happening without any apparent external cause.

He made a spontaneous offer of help.

Done by one's own free choice, or without planning.

proceeding from natural feeling or native tendency without external constraint

arising from a momentary impulse

controlled and directed internally : self-active : spontaneous movement characteristic of living things

produced without being planted or without human labor : indigenous

not apparently contrived or manipulated : natural

Random.

Sudden, without warning.

See also

• Aleatoric
• Improvisation