Bajar la guardia
/bah-HAR la GWAR-dee-ah/
To let one's guard down; to become less careful, vigilant, or defensive.
💡 Understanding the Idiom
🎨 Literal vs. Figurative

Literally, 'bajar la guardia' means 'to lower the guard', like a knight lowering their shield in a fight.

In reality, it means to become less defensive and more relaxed, whether emotionally or mentally.
Key Words in This Idiom:
📝 In Action
Después de unas semanas, empecé a bajar la guardia y a confiar en él.
B2After a few weeks, I started to let my guard down and trust him.
En los negocios, nunca puedes bajar la guardia, ni por un segundo.
B2In business, you can never let your guard down, not even for a second.
📜 Origin Story
This expression comes directly from the world of combat, like fencing or boxing. A fighter's 'guardia' is their defensive stance, using their hands and arms to protect themselves. To 'bajar la guardia' (lower the guard) is to drop this defensive posture, leaving oneself vulnerable to an attack. The metaphor was so clear and useful that it spread to describe any situation—emotional, professional, or personal—where you stop being careful and leave yourself open.
⭐ Usage Tips
Use It For More Than Fights
While its origin is physical, you'll most often hear 'bajar la guardia' used for emotional situations. It perfectly describes the moment you decide to trust someone, stop being suspicious, or allow yourself to be vulnerable.
A Word of Warning or Relief
This phrase can be used in two main ways: as a warning ('¡No bajes la guardia!' - Don't let your guard down!) or to express a sense of safety and relief ('Con mis amigos, puedo bajar la guardia' - With my friends, I can let my guard down).
❌ Common Pitfalls
Confusing it with 'Rendirse' (To Surrender)
Mistake: "Thinking 'bajar la guardia' means giving up completely."
Correction: 'Bajar la guardia' means you've become less careful, but you're still 'in the fight.' It's about a lapse in vigilance. 'Rendirse' means to surrender or quit entirely.
🌎 Where It's Used
Spain
Extremely common and universally understood.
Latin America
Extremely common and universally understood across all countries.
🔗 Related Idioms
✏️ Quick Practice
💡 Quick Quiz: Bajar la guardia
Question 1 of 1
If your friend says, 'Por fin encontré un trabajo donde puedo bajar la guardia,' what do they mean?
🏷️ Tags
Frequently Asked Questions
Is 'bajar la guardia' always negative?
Not at all! While it's often used as a warning (a negative context), it can be very positive. Saying you can 'bajar la guardia' with someone is a huge compliment, meaning you feel safe enough with them to be vulnerable and stop being defensive.