Lewis & Short

sŭb-audĭo, ii, ītum, 4, v. n. (postclass.).

  1. I. To understand, supply a word omitted: subaudito jubeo, Dig. 28, 5, 1; Aug. Civ. Dei, 15, 7; 17, 11; Greg. M. in Job, 33, 17.
  2. II. To hear a little: nocturnis subaudiens vocibus, App. M. 5, p. 167, 4.