loco

C2+ Topic:Describing Qualities

US /ˈloʊkoʊ/ UK /ˈləʊkəʊ/ See IPA manual

Meanings

1

adj
(informal) crazy; also a locomotive or a poisonous weed

He went completely loco when he heard the news.

Thesaurus

Synonyms

1 adj · (informal) crazy; also a... crazy insane mad deranged demented unhinged nuts

Opposites

sane rational sound lucid

Word family

Related forms locoweedlocomotive

Etymology

In the 'crazy' sense, borrowed from Spanish loco ('mad, insane'), of uncertain, possibly Arabic, origin. The 'locomotive' sense is a clipping of locomotive, ultimately from Latin locus 'place' + movēre 'to move'.

loco Spanish

View etymology graph ->

Topics

Describing Qualities Register & Style

External links

# loco

**Type:** Word
**Level:** C2+
**Part of speech:** adj
**IPA (US):** /ˈloʊkoʊ/
**IPA (UK):** /ˈləʊkəʊ/

## Meanings
1. (informal) crazy; also a locomotive or a poisonous weed

## Examples
- He went completely loco when he heard the news.

## Synonyms
- crazy
- insane
- mad
- deranged
- demented
- unhinged
- nuts

## Antonyms
- sane
- rational
- sound
- lucid

## Related Forms
- locoweed
- locomotive

## Roots and Affixes
- Root: loco

## Etymology
In the 'crazy' sense, borrowed from Spanish loco ('mad, insane'), of uncertain, possibly Arabic, origin. The 'locomotive' sense is a clipping of locomotive, ultimately from Latin locus 'place' + movēre 'to move'.

## AI Etymology
Loco is in the 'crazy' sense, borrowed from Spanish loco ('mad, insane'), of uncertain, possibly Arabic, origin. The 'locomotive' sense is a clipping of locomotive, ultimately from Latin locus 'place' + movēre 'to move'. The etymological trail includes Spanish loco. The same word family includes locoweed, locomotive. Its current adjective use means "(informal) crazy; also a locomotive or a poisonous weed".

## Topics
- Describing Qualities
- Register & Style

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