credential
n.
"that which entitles to credit," 1756, probably a back-formation from credentials. Earlier in English as an adjective, "confirming, corroborating" (late 15c.). As a verb, "provide with credentials," by 1828 (implied in dredentialed).
〔李〕[cred;-ent;-iala.] a.信任的 n.证件； 凭证等 ←cred,credit [L credere]=to believe 相信
〔蒋〕[cred信任，-ential复合后缀（ent+-ail）…的] 信任的，[转为名词] 凭证；（复数）信任状，国书