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"effective (works well)" in seven languages

Meaningeffective (works well)

Spanish

eficaz

/efiˈkaθ/

learned

French

efficace

/efikas/

learned

Italian

efficace

/effiˈkatʃe/

learned

Portuguese

eficaz

/efiˈkas/

learned

Romanian

eficace

/efiˈkatʃe/

borrowed · French efficace

Catalan

eficaç

/əfiˈkas/

learned

English

effective

/ɪˈfɛktɪv/

other source · Latin EFFECTĪVUS

A sibling of EFFICĀX: both from EFFICERE 'to bring about'. English has efficacious too.

English → Italianeffective (works well)efficaceNot relatedDifferent sources — learn this one fresh. But English has relatives: efficacious, efficacy, efficient.What English and Italian share

The Latin ancestor

EFFICĀCEM (nom. EFFICĀX)‘productive, effectual’

All six sisters descend from it, unless marked otherwise below.

The story

Trap: Spanish efectivo usually means 'cash' (pagar en efectivo), and French effectif means 'actual' or 'staff'. For 'it works' say eficaz, efficace.

English relatives: efficacious, efficacy, efficient

Sound laws at work

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In a sentence

  • esEste medicamento es muy eficaz.
  • frCe médicament est très efficace.
  • itQuesto farmaco è molto efficace.
  • ptEste remédio é muito eficaz.
  • roMedicamentul acesta este foarte eficace.
  • caAquest medicament és molt eficaç.
  • enThis medicine is very effective.

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