- An elongated hill or ridge of glacial drift.鼓丘：长形小山或冰碛丘
- From drum [ridge] 源自 drum [山脊]
- from Irish Gaelic druim [back, ridge] 源自 爱尔兰盖尔语 druim [背，脊]
- from Old Irish 源自 古爱尔兰语
- investigated
- investigates
- investigating
- investigation
- investigation
- investigations
- investigative
- investigator
- investigators
- investing
- investiture
- investitures
- investment
- investment bank
- investments
- invests
- inveterate
- inveterated
- inveterates
- inveterating
- inviable
- invidious
- invigorate
- invigorated
- invigorates