Lewis & Short

sŭb-intellĕgo, ĕre, v. a.,

  1. I. to understand or perceive a little (late Lat.), Tert. adv. Marc. 5, 3; Hier. Ep. 145 med.
  2. II. To supply in thought, understand in addition, Aug. Trin. 6, 4; id. Serm. 104, 3 fin.; Greg. M. in Job, 33, 7 al.