conspondeo

con-spondĕo, ndi, nsum (old orthog. consposum, acc. to Paul. ex Fest. p. 41, 14 Müll.), 2, v. a. and n.,

to engage or promise something mutually (ante- and postclass. and very rare): NEVE. CONSPONDISE. NEVE. CONPROMESISE. VELET., S. C. Bacch.; Wordsworth, Fragm. and Spec. p. 172: consponsi, Naev. ap. Varr. L. L. 6, § 70 Müll.; cf. Paul. l. l.: consponsa factio, Ap. Met. 5, 14, 1; so, foedus, Aus. Ep. 10, 11.