the world > action or operation > advantage > usefulness > use (made of things) > instrumentality > render instrumental [verb (transitive)] > use as mere instrument (2)
transitive. To use for one's own ends; to exploit. Also with away. Cf. property, n. 6.
transitive. To train or mould (a person, his or her ways) to a particular mode of life or behaviour; (also) to use as an agent or instrument. Obsolete…