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- a devastating commentary on
- a devastating commentary on something
- a devastating commentary on sth
- a devil
- a devil of a
- a devil of a job
- a devil of a time
- a devil of a time/job etc
- ADHD
- adhere
- adhered
- adherence
- adherence
- adherences
- adherent
- adherently
- adherents
- adheres
- adhere to
- adhere to something
- adhere to sth
- adhering
- adhesion
- adhesional
- adhesive