Lewis & Short

instillo, āvi, ātum, 1, v. a., to pour in by drops, to drop in, to instil (class.).

  1. I. Lit.: haec quoque, nisi tamquam lumini, oleum instilles, extinguuntur senectute, Cic. de Sen. 11: (oleum) caulibus. Hor. S. 2, 2, 62: auribus sucum brassicae, Plin. 20, 9, 33, § 83.
    1. B. To drop into or upon: guttae, quae saxa assidue instillant Caucasi, Cic. poët. Tusc. 2, 10 fin.
  2. II. Trop., to instil, to inspire with: uberrimae tuae litterae mihi quiddam quasi animulae instillarunt (al. restillarunt), Cic. Att. 9, 7, 1: praeceptum auriculis, Hor. Ep. 1, 8, 16.