Word
spontaneously
Phoneticsspon·ta·neous·ly
US/spɑnˈteɪniəsɫi/
UK/spɒntˈeɪniəsli/
Adverb of manner
Definition
adv. to do something suddenly because you want to, without planning it first. It describes an action that happens naturally on its own.
adv. occurring as a result of a sudden inner impulse or inclination and without premeditation. Often describes natural processes that occur without external influence.
Examples
“The crowd spontaneously started to cheer.”
“After the performance ended, the audience spontaneously rose for a standing ovation despite no one leading the applause.”
“In certain chemical environments, the compound may spontaneously ignite when exposed to oxygen, requiring researchers to handle the substance within a strictly controlled vacuum.”
Examples
simple
“The crowd spontaneously started to cheer.”
contextual
“After the performance ended, the audience spontaneously rose for a standing ovation despite no one leading the applause.”
complex
“In certain chemical environments, the compound may spontaneously ignite when exposed to oxygen, requiring researchers to handle the substance within a strictly controlled vacuum.”
Usage
Typically placed before the main verb or at the end of a clause to describe how an action occurs.
Pitfall
He did it spontaneous
He did it spontaneously
Learners often use the adjective form 'spontaneous' when the adverbial form is required to modify a verb.
Real-World Examples
“A growing 53% of consumers spontaneously mentioned that high prices are weighing down current personal finances, up from 50% last month and 45% in January 2026.” “After receiving prosthe6, however, the blind mice once again spontaneously favored dark areas.” Etymology
From spontaneous + -ly.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.
Word family
NOUN
ADJECTIVE
ADVERB
- Exam level
- CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.B2 FirstIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.5.5–6.5TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 4.0–4.572–94TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.785–944
- Frequency
- Frequent
- Level
- B2 · Upper Intermediate
- Updated
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QR code
englishreference.com/q/spontaneously