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SPANISH · A WORD WITH POSSIBILITIES

loco.

crazy, insane, mad, nuts (asserting that something is out of place in the head)

4 characters2 syllables approx.Español language

Meaning & usage

adj/ˈloko/[ˈlo.ko]

  1. crazy, insane, mad, nuts (asserting that something is out of place in the head)

    Estoy loco por ti.
    David está muy loco.

  2. rash, risky, imprudent

    una decisión loca de último momento
    No sean locos, tómense su tiempo.

  3. tremendous, terrific, huge, enormous

    Tuviste una suerte loca al ganar la rifa.

  4. malfunctioning, broken and working incorrectly (said of a machine)

    El reloj de la abuela se ha vuelto loco.

  5. overgrown, rambling

    Los arbustos se ven locos, deberías podarlos.
    El cabello se te ve loco, ve a cortártelo.

  6. loose (pipe fittings, pulley)

  7. sexy (only with ser)

    colloquial
    Pero qué loca es, qué loca se ve.
Where this word comes from

Uncertain. Inherited from Old Spanish loco, perhaps from Andalusian Arabic لَوْقَاء (láwqa), from Arabic لَوْقَاء (lawqāʔ), feminine singular form of أَلْوَق (ʔalwaq, “stupid”), by reinterpreting the final Andalusian Arabic -a as the Ibero-Romance -a and back-forming the masculine with -o. Edward Roberts thinks the term is related to Arabic لَاق (lāq, “to soften”), but this verb is of root l-y-q, not l-w-q like أَلْوَق (ʔalwaq). Alternatively, derived from Ancient Greek γλαυκός (glaukós, “clear”). Compare Portuguese louco and Sicilian loccu.

noun/ˈloko/[ˈlo.ko]

  1. a crazy person; a madman

    derogatory · masculine
    Ese es un loco; ten cuidado.

  2. dude, guy

    Caribbean · Central-America · South-America · Spain · also · colloquial · masculine · vocative

  3. a highly affected homosexual; fruit

    masculine

  4. a plant in the genus Astragalus or Oxytropis

    masculine
Where this word comes from

Uncertain. Inherited from Old Spanish loco, perhaps from Andalusian Arabic لَوْقَاء (láwqa), from Arabic لَوْقَاء (lawqāʔ), feminine singular form of أَلْوَق (ʔalwaq, “stupid”), by reinterpreting the final Andalusian Arabic -a as the Ibero-Romance -a and back-forming the masculine with -o. Edward Roberts thinks the term is related to Arabic لَاق (lāq, “to soften”), but this verb is of root l-y-q, not l-w-q like أَلْوَق (ʔalwaq). Alternatively, derived from Ancient Greek γλαυκός (glaukós, “clear”). Compare Portuguese louco and Sicilian loccu.

noun/ˈloko/[ˈlo.ko]

  1. Chilean edible gastropod mollusk that resembles abalone but is, in fact, a muricid (Concholepas concholepas)

    Chile · masculine
Where this word comes from

From Mapudungun [Term?].

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.