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
Sparing; parsimonious; chary.
Not full, large, or plentiful; scarcely sufficient; scanty; meager.
Very little, very few.
To fail, or become less; to scantle.
To limit in amount or share; to stint.
A sheet of stone.
Scarcity; lack.
A small piece or quantity.
A slightly thinner measurement of a standard wood size.
A block of stone sawn on two sides down to the bed level.