spontaneous

happening or done without planning, suddenly and unexpectedly

espontáneo, inesperado

• [T + adj]
• [adj + infinitive]

Collocations spontaneous decision · spontaneous action

• She made a spontaneous decision to visit her old school.

  Ella tomó una decisión espontánea de visitar su antigua escuela.

done or expressed in a natural and sincere way, without thinking about it beforehand

natural, sincero

• [T + adj]
• [adj + noun]

Collocations spontaneous smile · spontaneous reaction

• He gave her a spontaneous hug.

  Él la abrazó de manera espontánea.