Usage Note
Tenacidad is an abstract feminine noun denoting persistent determination; its adjective is tenaz and adverb tenazmente. It is a near-synonym of perseverancia but carries a stronger connotation of clinging stubbornness, not just steady effort. The plural tenacidades is grammatically valid but rarely used.
Examples
"Su tenacidad la llevó al éxito."
Natural Translation
Her tenacity led her to success.

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