to “lie down with”, i.e.

  1. trs. to dwell on, harp on (an idea) SN.ii.65; SN.iii.36; SN.iv.208.
  2. (of the idea) to obsess, to fill the mind persistently, to lie dormant & be continually cropping up. MN.i.40, MN.i.108, MN.i.433; SN.ii.54 (so read with SS for anusavanti), SN.iv.188; AN.i.283; AN.iii.246 Pp.32, Pp.48

pp anusayita (q.v.).

anu + seti. cp. Sk. anuśayate or˚ śete, from śī