supernumerate
/ˌsuːpərˈnjuːməreɪt/ /ˌsjuːpərˈnjuːməreɪt/verb
[no object] To become supernumerary; to act as a supernumerary. Also with object: to make (a person) supernumerary.
Origin
Mid 17th century (in an earlier sense). From classical Latin super numerum above or beyond the number + -ate.