spontaneously

English

Etymology tree

Late Latin sponte

Proto-Indo-European *-nós

Proto-Italic *-nos

Late Latin -nus

Late Latin -ānus

Proto-Indo-European *-yósder.

Proto-Indo-European *-éyos

Proto-Italic *-ejos

Proto-Italic *-eos

Late Latin -eus

Late Latin -āneus

Late Latin spontāneuslbor.

English spontaneous

Proto-Indo-European *leyg-der.

Proto-Germanic *līkąder.

Proto-Germanic *-līkaz

Proto-Germanic *-ê

Proto-Germanic *-līkê

Proto-West Germanic *-līkē

Old English -līċe

Middle English -ly

English -ly

English spontaneously

spontaneously (comparative more spontaneously, superlative most spontaneously)

In a spontaneous manner; naturally; voluntarily.
- 1998 May 26, C. Claiborne Ray, “Q&A; Spontaneous Combustion”, in The New York Times‎^[1], archived from the original on 4 November 2023:
  The idea that the body could spontaneously ignite was promoted by the 19th-century temperance movement.
- 2018 July 13, Shoshi Parks, “How Deaf Children in Nicaragua Created a New Language”, in Atlas Obscura‎^[2], archived from the original on 29 March 2025:
  Smaller-scale isolated deaf-education programs had existed previously in 20th-century Nicaragua, Shepard-Kegl says, but the critical mass needed to spontaneously develop Nicaraguan Sign Language only occurred with the opening of Melania Morales.

in a spontaneous manner