Words from this root (4)
efficacious
C2+
/ˌɛfɪˈkeɪʃəs/
effective in producing a desired result
efficacity
C2+
/ˌɛfɪˈkæsəti/
the power or capacity to produce a desired effect; efficacy
efficacy
C2+
/ˈɛfɪkəsi/
the ability to produce a desired or intended result
efficaciously
C2+
/ˌɛfəˈkeɪʃəsli/
in a way that produces the intended result effectively