Lewis Short
(verb) : fistūco, no
* Perf., ātum, 1, fistuca,to ram down or in, to ram fast: fundamenta,Cato, R. R. 18, 7: solum,Plin. 36, 25, 63, § 188; Vitr. 7, 4 fin.: rudus pedali crassitudine,Plin. 36, 25, 62, § 186.—In the part. perf. absol.: terram circa radices fistucato spissandam, by ramming down, i. q. fistucatione, Plin. 17, 11, 16, § 87.
Charlton T. Lewis, Charles Short, A Latin Dictionary