atortar

A little-used regional word with two quite different senses depending on the country: to settle in comfortably somewhere in some dialects, and to fail or flunk a student in others. It's genuinely rare enough that most native speakers outside the specific regions using it won't recognize either sense.

• Se atortó en el sillón a ver la tele toda la tarde. — He settled in comfortably on the couch to watch TV all afternoon.
• El profesor lo atortó por no entregar los trabajos. — The teacher flunked him for not turning in his assignments.
• Prefiero atortarme en casa los domingos. — I prefer to settle in comfortably at home on Sundays.

Assuming atortar has one stable meaning across the Spanish-speaking world — its regional senses (settling in vs. failing a student) don't overlap at all, so context and country matter more than usual for this word.