contravalere

contravalēre , to countervail, be equivalent to. quia thaini jusjurandum ~et jusjurandum sex villanorum et, si occideretur, plene vindicaretur in sex villanis (Leg. Hen. 64. 2b) GAS 583; s1290 quelibet libra de florenis ~et xxxij libras in denariis G. S. Alb. I 470.