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Definitions from Wiktionary ()
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▸ adjective: expressing the proportion of consumed energy that was successfully used in a process; the ratio of useful output to total input
▸ adjective: causing effects, producing results; bringing into being; initiating change (rare except in philosophical and legal expression efficient cause = causative factor or agent)
▸ adjective: (proscribed, old use) effective, efficacious
▸ noun: (obsolete) a cause; something that causes an effect
Similar:
effective,
timesaving,
prompt,
competent,
expeditious,
economical,
businesslike,
streamlined,
economic,
high-octane,
more...
Opposite:
Types:
energy-efficient,
time-efficient,
cost-efficient,
water-efficient,
space-efficient,
resource-efficient,
process-efficient,
more...
Phrases:
Adjectives:
Colors:
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