Constructive and Efficient

adjective

• Constructing or tending to construct or improve or promote development.
  • usage: "constructive criticism"; "a constructive attitude"; "a constructive philosophy"; "constructive permission"
• Emphasizing what is laudable or hopeful or to the good.
  • usage: "constructive criticism"

• (a.) Having ability to construct or form; employed in construction; as, to exhibit constructive power.
• (a.) Derived from or depending on, construction or interpretation; not directly expressed, but inferred.

adjective

• Being effective without wasting time or effort or expense.
  • usage: "an efficient production manager"; "efficient engines save gas"
• Able to accomplish a purpose; functioning effectively.
  • usage: "people who will do nothing unless they get something out of it for themselves are often highly effective persons...-G. B. Shaw; "effective personnel"; "an efficient secretary"; "the efficient cause of the revolution"
  • synonyms: effective

• (n.) Causing effects; producing results; that makes the effect to be what it is; actively operative; not inactive, slack or incapable; characterized by energetic and useful activity; as, an efficient officer, power.
• (n.) An efficient cause; a prime mover.