Lewis & Short

pĕr-hŏnōrĭfĭcus, a, um, adj.

  1. I. That does one much honor, very honorable: con salutatio forensis perhonorifica, Cic. Att. 2. 18, 1: discessus, id. Prov. Cons. 19, 45.
  2. II. That shows much honor to another, very respectful: collega in me perhonorificus, Cic. Att. 1, 13, 2.
    Adv.: pĕrhŏnōrĭfĭcē, very respectfully, Cic. Att. 14, 12, 2.