Efficacious |

ef·​fi·​ca·​cious | \ ˌe-fə-ˈkā-shəs

Adjective meaning |

Having the power to produce a desired effect.

Sample sentence |

The new plants in her garden were an efficacious method for feeling better.

Synonyms |

• Effective
• Effectual
• Efficient
• Fruitful
• Operative
• Potent
• Productive