1.indigenous a.土產的，本地的(native)

詞根記憶：來自indigene(n．土著)

例：indigenous population of America美洲的土著居民

2.indigent a.貧窮的(impoverished)

聯想記憶：in(不)+dig(挖)+ent--挖不出東西的--貧窮的

例：The indigent family lived under a bridge.

3.indirect a.間接的；迂回的(not direct)

詞根記憶：in（不）+direct(直接的)--不直接的--間接的

例：Biocontrol agents are likely to have indirect as well as direct adverse effects on nontarget species.

派生詞：indirectly( ad.間接地)

4.indiscriminate a.不加區別的(not marked by careful distinction）；不受限制的(unrestrained)

詞根記憶：in（不）+discriminate(區別)--不加區別的

例：Bill is quite indiscriminate in his choice of clothing.

派生詞：indiscriminately( ad.不分皂白地，不加選擇地)

5.indispensable a．必不可少(absolutely necessary)

詞根記憶：in（不）+dispensable(可有可無的)--不是可有可無的--必不可少的

例：Satellites are indispensable in the identification of weather patterns.