Spontaneous

spon-ta'-ne-us, a. of one's own free accord; purely self-suggested, originated, or derived; of itself, without external interference or constraint. Spontaneous combustion, a taking fire of itself. Spontaneously, spon-ta'-ne-us-le, ad. in a spontaneous manner. Spontaneousne , spon-ta'-ne-us-ne , s. the quality of being spontaneous (L. sponge, of free will).