effective, efficacious
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
Used in real life; practical.
In paid employment.
Enough to allow one to use something.
Of or relating to employment.
That suffices but requires additional work.
That is or are functioning.
Method of operation.
Becoming full of a vegetable substance.
Operation; action.
The incidental or subsidiary calculations performed in solving an overall problem.
A train movement.
Fermentation.
A place where work is carried on.