spontaneous

[ spon-tey-nee-uhs ]
/ spɒnˈteɪ ni əs /

adjective

coming or resulting from a natural impulse or tendency; without effort or premeditation; natural and unconstrained; unplanned: a spontaneous burst of applause.
(of a person) given to acting upon sudden impulses.
(of natural phenomena) arising from internal forces or causes; independent of external agencies; self-acting.
growing naturally or without cultivation, as plants and fruits; indigenous.
produced by natural process.

Origin of spontaneous

1650–60; < Late Latin spontāneus, equivalent to Latin spont(e) willingly + -āneus ( -ān(us) -an + -eus -eous)

SYNONYMS FOR spontaneous

1 unpremeditated, free.

ANTONYMS FOR spontaneous

1 premeditated.

synonym study for spontaneous

1. See automatic, voluntary.

OTHER WORDS FROM spontaneous

Words nearby spontaneous

sponsion, sponson, sponsor, sponsored, spontaneity, spontaneous, spontaneous abortion, spontaneous amputation, spontaneous combustion, spontaneous gangrene of newborn, spontaneous generation

Example sentences from the Web for non-spontaneous

British Dictionary definitions for non-spontaneous

spontaneous
/ (spɒnˈteɪnɪəs) /

adjective

occurring, produced, or performed through natural processes without external influence spontaneous movement
arising from an unforced personal impulse; voluntary; unpremeditated a spontaneous comment
(of plants) growing naturally; indigenous

Derived forms of spontaneous

spontaneously, adverb spontaneousness, noun

Word Origin for spontaneous

C17: from Late Latin spontāneus, from Latin sponte voluntarily