burst of inspiration
The Spanish term 'arranque de inspiración' does not have a direct, word-by-word translation in English. Generally, it can be translated in the context of a 'burst of inspiration' or 'sudden inspiration'. It refers to a sudden, often unexpected, surge of creative or imaginative energy, i.e. a moment when a creative idea or solution spontaneously 'comes' to you without your conscious effort or planning.
Faced with the dilemma, he had a burst of inspiration and solved the problem.
This sentence describes a situation where the subject was confronted with a problem, and had a sudden or spontaneous idea, i.e. a 'burst of inspiration', which helped them resolve the issue.
In the middle of his speech, a burst of inspiration provided him with the right words.
This example indicates that during a speech, the speaker had a spontaneous or sudden idea or thought - a 'burst of inspiration', which enabled them to find the exact words they needed to express their thoughts.
While writing his novel, a burst of inspiration made him change the ending.
This statement describes a situation where an author was in the process of writing their novel and a sudden idea or thought - a 'burst of inspiration', precipitated a change in the ending of the novel.