pertinaz

The Spanish word "pertinaz" is an adjective that describes someone or something that is persistent, stubborn, or tenacious in a way that is often seen as difficult or annoying.

Meaning:

1. Persistent/Stubborn: When someone is pertinaz, they persist in their behavior, opinions, or actions against opposition or difficulty. It conveys a sense of firmness or obstinacy.
2. Unrelenting/Continuous: It can also describe something that continues for a long time without stopping, such as a "lluvia pertinaz" (persistent rain), meaning it has been raining incessantly.

Etymology:

The word "pertinaz" comes from Latin pertinax, which means "holding fast," "resolute," or "very persistent."

Synonyms:

• Terco (stubborn)
• Obstinado (obstinate)
• Empecinado (dogged)
• Tenaz (tenacious)
• Insistente (insistent)
• Incesante (incessant), in contexts of persistence over time (e.g., persistent rain)

Antonyms:

• Flexible (flexible)
• Dócil (docile)
• Cambiante (changeable)
• Intermitente (intermittent, for things like rain or behavior)
• Inconstante (inconstant)

Usage Examples:

• "Fue pertinaz en su esfuerzo por lograr el objetivo."
  (He was persistent in his effort to achieve the goal.)
• "La pertinaz lluvia dificultó el partido."
  (The persistent rain made the match difficult.)

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In brief, pertinaz emphasizes a persistence or stubbornness that can be admirable but sometimes frustrating, or a continuous, relentless state when describing conditions.