D / dēcōlo
verb intransitive

dēcōlo

2nd PP dē-cōlāre · 3rd PP dē-cōlāvi · conj. 1st
(old fut. perf. decolassit = decolaverit, Plaut. Cas. 2, 4, 28)
to come to naught, to fail
colum; lit., to trickle from or through; hence trop., to come to naught, to fail (ante-class.): si spes decolabit, Plaut. Gapt. 3, 1, 37; cf. id. Casin. 2, 4, 28: quorum si alterutrum decolat, Varr. R. R. 1, 28.