I.v. pass., to be made to reel or totter, to be brought to ruin (perh. only in the foll. examples): “haec (mens animaeque potestas) ipso cum corpore collabefiunt,” sink together, Lucr. 3, 585 (601): “ut altera (navis) praefracto rostro tota collabefieret,” was dashed in pieces, Caes. B. C. 2, 6.— Poet. of the melting of metals, Lucr. 4, 697 (cf. collabefacto; “and labefacta,” Verg. A. 8, 390).—
II. Trop., to overthrow, supplant: “a Themistocle collabefactus,” Nep. Arist. 1, 2.