Establishes (bebaiōn). Present active participle from bebaios, firm. An apt metaphor in Corinth where confirmation of a bargain often took place (bebaiōsis) as Deissmann shows (Bible Studies, p. 109) and as 2Co 1:22 makes plain.
Anointed (chrisas). From chriō, to anoint, old verb, to consecrate, with the Holy Spirit here as in 1Jo 2:20.