efficace meaning in English

effective▼(having the power to produce a required effect or effects)
adjective
[UK: ɪ.ˈfekt.ɪv] [US: ɪ.ˈfekt.ɪv]Is hydrotherapy effective? = L'idroterapia è efficace?

meaningful▼(having meaning, significant)
adjective
[UK: ˈmiː.nɪŋ.fəl] [US: ˈmiː.nɪŋ.fəl]

powerful▼(having or capable of exerting power, potency or influence)
adjective
[UK: ˈpaʊə.fəl] [US: ˈpaʊər.fəl]

effectively▼(in an efficient or effective manner; with powerful effect)
adverb
[UK: ɪ.ˈfekt.ɪv.li] [US: ɪ.ˈfekt.ɪv.li]Consistent and regular practice is essential for mastering a foreign language effectively. = Una pratica assidua e regolare è essenziale per padroneggiare efficacemente una lingua straniera.

effectually▼(in such a way as to achieve a desired result)
adverb
[UK: ɪ.ˈfek.tʃʊə.li] [US: ɪ.ˈfek.tʃʊə.li]

efficaciously▼(in an efficacious manner)
adverb
[UK: ˌe.fɪˈk.eɪ.ʃə.sli] [US: ˌe.fɪˈk.eɪ.ʃə.sli]

irresistible grace▼(Calvinist doctrine)
noun

ineffective▼(not having the desired effect; ineffectual)
adjective
[UK: ˌɪ.nɪ.ˈfek.tɪv] [US: ˌɪ.nə.ˈfek.tɪv]I hope it won't be ineffective. = Spero che non sarà inefficace.

inefficient▼(not efficient; not producing the effect intended or desired)
adjective
[UK: ˌɪ.nɪ.ˈfɪʃnt] [US: ˌɪ.nə.ˈfɪ.ʃənt]

toothless▼(Being weak)
adjective
[UK: ˈtuːθ.ləs] [US: ˈtuːθ.ləs]

unavailing▼(fruitless, futile, useless)
adjective
[UK: ˌʌ.nə.ˈveɪl.ɪŋ] [US: ˌʌ.nə.ˈveɪl.ɪŋ]