1. sparingly= using or doing only a little of something
2. discursive= discussing many different ideas, facts etc,
without always having a clear purpose a long, discursive article
—discursively adverb
3. contingent= depending on something that may happen in the future
SYN dependent
contingent on/upon
e.g. Further investment is contingent upon the company’s profit performance.
4. sophisticated=
01 having a lot of experience of life, and good judgment about socially important things such as art, fashion etc
02 a sophisticated machine, system, method etc is very well designed and very advanced, and often works in a complicated way
03 having a lot of knowledge and experience of difficult or complicated subjects and therefore able to understand them well
—sophistication /səˌfɪstɪˈkeɪʃən/ noun [uncountable]