I
n.
investigation
1) to conduct, do, make a ~
2) a careful, detailed, exhaustive, in-depth, intensive, rigorous, thorough; scientific ~
3) a classic, classical; definitive ~
4) a case; epidemiological; experimental; time-and-motion ( AE ), work ( BE ) ~
5) under ~ (the matter is under ~)
branch of learning, subject
6) nature ~
learning
7) supervised ~
II
v.
1) to ~ diligently, hard
2) ( D ; intr. ) to ~ for (to ~ for a degree)
3) ( d ; intr. ) to ~ under (to ~ under a well-known professor)
4) ( Q ) to ~ how to survive in the wilderness