suppletory
Sup"ple*to*ry, n.; pl. Suppletories (. Defn: That which is to supply what is wanted. Invent suppletories to excuse an evil man. Jer. Taylor. Sup"ple*tive, Sup"ple*to*ry, a. Etym: [Cf. F. supplétif, LL. suppletivus, from L. supplere, suppletum, to fill up. See Supply.] Defn: Supplying deficiencies; supplementary; as, a suppletory oath.