mortarboard
Word family nounmortarmortarboard
College
mor·tar·board /ˈmɔːtəbɔːd $ ˈmɔːrtərbɔːrd/ noun [countableC] 
SECa black cap with a flat square top worn by members of some universities on formal occasions 学士帽，学位帽 →5 see picture at 见图 hat- invertible
- inverting
- inverts
- invest
- investable
- invested
- investible
- investigate
- investigated
- investigates
- investigating
- investigatings
- investigation
- investigation
- investigational
- investigative
- investigative
- investigative journalism
- investigative journalism/report/work
- investigative report
- investigative work
- investigator
- investigator
- investigators
- investigatory
- 锻炼
- 锻造
- 锼
- 锽
- 锽锽
- 锾
- 锿
- 镀
- 镀金
- 镁
- 镂
- 镂空
- 镂骨铭心
- 镃
- 镃
- 镄
- 镅
- 镆
- 镆铘
- 镇
- 镇压
- 镇守
- 镇定
- 镇日
- 镇痛