rē-stĭpŭlor, āri,
v. dep. a. , to stipulate , promise , or engage in return (syn.: recipio, despondeo), Cic. Rosc. Com. 13, 38; Ap. Mag. p. 338, 25; Val. Max. 2, 8, 2.
re-stipulor —, ārī, dep.,to stipulate in return, exact a reciprocal promise. ...
An Elementary Latin Dictionary