once-enthusiastic
definitions
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adjective
Having previously been characterized by great passion, excitement, or eagerness, but no longer possessing those qualities.es: Antaño entusiasta
examples
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His once-enthusiastic scientific ambition had transformed into a profound existential dread, as the consequences of his reckless experimentation became apparent.
Su otrora entusiasta ambición científica se había transformado en un profundo pavor existencial, a medida que se hacían evidentes las consecuencias de su experimentación temeraria.