expressing the proportion of consumed energy that was successfully used in a process; the ratio of useful output to total input
causing effects, producing results; bringing into being; initiating change (rare except in philosophical and legal expression efficient cause = causative factor or agent)
making good, thorough, or careful use of resources; not consuming extra. Especially, making good use of time or energy
effective, efficacious
Incorporating all of the fittings into connected units.
simple past tense of fit ("to tailor, to change size")
simple past tense of fit (other senses)