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siniestro

see-nee-ESS-troh/siˈnjestɾo/

sinister

Also: creepy, spooky
A dark, shadowy figure standing in a foggy alleyway under a dim streetlamp.

📝 In Action

La casa abandonada tiene un aspecto muy siniestro.

A2

The abandoned house looks very sinister.

Ese hombre tiene una mirada siniestra.

B1

That man has a creepy look in his eyes.

Había un silencio siniestro en el bosque.

B2

There was a spooky silence in the forest.

Word Connections

Synonyms

Antonyms

  • alegre (cheerful)
  • tranquilizador (reassuring)

Common Collocations

  • mirada siniestra – sinister look
  • plan siniestro – sinister plan

accident

Also: loss, casualty
NounmB2formal
A small blue car that has bumped into a wooden fence, showing a slight dent.

📝 In Action

El seguro no cubrirá el siniestro si el conductor estaba bebido.

B2

The insurance won't cover the accident if the driver was drunk.

Tras el incendio, el edificio fue declarado siniestro total.

C1

After the fire, the building was declared a total loss.

Hubo varios siniestros en la carretera debido a la lluvia.

B1

There were several accidents on the road due to the rain.

Word Connections

Synonyms

  • accidente (accident)
  • catástrofe (catastrophe)

Antonyms

Common Collocations

  • siniestro total – total write-off / total loss
  • parte de siniestro – accident report/claim

Translate to Spanish

Words that translate to "siniestro" in Spanish:

accident→casualty→creepy→loss→sinister→spooky→

✏️ Quick Practice

Quick Quiz: siniestro

Question 1 of 3

Which of these is the most common meaning of 'siniestro' in an insurance document?

📚 More Resources

👥 Word Family▼
siniestramente(sinisterly) — Adverb
siniestralidad(accident rate) — Noun
🎵 Rhymes▼
📚 Etymology▼

From Latin 'sinister,' which simply meant 'left' or 'on the left side.' Because the left side was considered unlucky or a bad omen in ancient traditions, the word evolved to mean 'evil' or 'scary.'

First recorded: 13th century

Cognates (Related words)

English: sinisterItalian: sinistro

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Frequently Asked Questions

Does 'siniestro' still mean 'left'?

Not usually. While it comes from the Latin word for 'left,' today it almost always means 'creepy' or 'accident.' Use 'izquierdo' for the direction.

Is it the same as the English word 'sinister'?

Mostly! When describing a vibe or a plan, it's identical. However, Spanish adds the extra meaning of 'insurance accident,' which English doesn't have.

Is it a very common word?

As an adjective (creepy), it's moderately common. As a noun (accident), you'll see it every time you look at an insurance policy or read the news.