Origin: 1650–60; <
Late Latin spontāneus, equivalent to
Latin spont(
e) willingly +
-āneus (
-ān(
us)
-an +
-eus -eous)
Related formsspon·ta·ne·ous·ly, adverb
spon·ta·ne·ous·ness, noun
non·spon·ta·ne·ous, adjective
non·spon·ta·ne·ous·ly, adverb
non·spon·ta·ne·ous·ness, noun
EXPANDsem·i·spon·ta·ne·ous, adjective
sem·i·spon·ta·ne·ous·ly, adverb
sem·i·spon·ta·ne·ous·ness, noun
sub·spon·ta·ne·ous, adjective
sub·spon·ta·ne·ous·ly, adverb
sub·spon·ta·ne·ous·ness, noun
un·spon·ta·ne·ous, adjective
un·spon·ta·ne·ous·ly, adverb
un·spon·ta·ne·ous·ness, noun
COLLAPSEAntonyms
1. premeditated.