conpromitto

com-prōmitto ( conp- ), mīsi, missum, 3 (contr. form conpromesise = conpromisisse, S. C. Bacch. v. 14), v. a., jurid. t. t. in lawsuits, to promise mutually to abide by the decision of an arbiter:

tribunicii candidati conpromiserunt,

Cic. Q. Fr. 2, 14 (15, 6):

de aliquā re,

Dig. 4, 8, 13:

in arbitrum,

ib. 44, 4, 4; 4, 8, 21 al.—

II.

To promise at the same time (very rare):

eisque spolia peremptorum hostium compromittens,

Cassiod. Hist. Eccl. 6, 1.