I   indication- something like a sign that indicates or points out infanticide- the killing of a young child infectious- related to sense spread from one person to another inhabitants- people who live in a place illiterate- no able to read or write illustrate- to make clear or explain immunities- ability of the body to resist disease innovation- something new that is introduced intertribal- occurring between tribes (groups of families with common characteristics who live and work together) intervillage- occurring between villages (small towns) intricately- having many complicated, complex parts