complemental
adjective
com·ple·men·tal ˌkäm-plə-ˈmen-tᵊl 
1
: relating to or being a complement
2
obsolete : ceremonious, complimentary
Word History
Etymology
complement entry 1 + -al entry 1
First Known Use
1597, in the meaning defined at sense 1
- construal
- construales
- construals
- construct
- construct form
- construct state
- constructability
- constructable
- constructed
- constructers
- constructibility
- constructible
- constructing
- construction
- construction bond
- construction loan
- construction paper
- construction wrench
- constructional
- constructionally
- constructionism
- constructionist
- constructionists
- constructions
- constructive