firmament /fûrˈmə-mənt/

1. The solid sphere in which the stars were formerly thought to be fixed
2. The sky

firmamental /-mentˈl/ adjective

• dematerializing
• demayne
• deme
• demean
• demeane
• demeaned
• demeaning
• demeanor
• demeanors
• demeanour
• demeanours
• demeans
• demeasnure
• demeasnures
• dement
• dementate
• dementated
• dementates
• dementating
• demented
• dementedly
• dementedness
• dementednesses
• dementia
• dementia praecox