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From labō (give way; waver) + faciō (do, make).


labefaciō (present infinitive labefacere, perfect active labefēcī, supine labefactum); third conjugation iō-variant, irregular passive voice

  1. I cause to totter, shake, loosen, make ready to fall.
  2. (figuratively, of a person's mind) I cause to waver, shake, weaken.
  3. (figuratively) I weaken; overthrow, ruin, destroy.


  • The verb has an irregular conjugation as for the passive voice.
   Conjugation of labefacio (third conjugation -variant, irregular and suppletive in the passive)
indicative singular plural
first second third first second third
active present labefaciō labefacis labefacit labefacimus labefacitis labefaciunt
imperfect labefaciēbam labefaciēbās labefaciēbat labefaciēbāmus labefaciēbātis labefaciēbant
future labefaciam labefaciēs labefaciet labefaciēmus labefaciētis labefacient
perfect labefēcī labefēcistī labefēcit labefēcimus labefēcistis labefēcērunt, labefēcēre
pluperfect labefēceram labefēcerās labefēcerat labefēcerāmus labefēcerātis labefēcerant
future perfect labefēcerō labefēceris labefēcerit labefēcerimus labefēceritis labefēcerint
passive present labefīō labefīs labefit labefīmus labefītis labefīunt
imperfect labefīēbam labefīēbās labefīēbat labefīēbāmus labefīēbātis labefīēbant
future labefīam labefīēs labefīet labefīēmus labefīētis labefīent
perfect labefactus + present active indicative of sum
pluperfect labefactus + imperfect active indicative of sum
future perfect labefactus + future active indicative of sum
subjunctive singular plural
first second third first second third
active present labefaciam labefaciās labefaciat labefaciāmus labefaciātis labefaciant
imperfect labefacerem labefacerēs labefaceret labefacerēmus labefacerētis labefacerent
perfect labefēcerim labefēcerīs labefēcerit labefēcerīmus labefēcerītis labefēcerint
pluperfect labefēcissem labefēcissēs labefēcisset labefēcissēmus labefēcissētis labefēcissent
passive present labefīam labefīās labefīat labefīāmus labefīātis labefīant
imperfect labefierem labefierēs labefieret labefierēmus labefierētis labefierent
perfect labefactus + present active subjunctive of sum
pluperfect labefactus + imperfect active subjunctive of sum
imperative singular plural
first second third first second third
active present labeface labefacite
future labefacitō labefacitō labefacitōte labefaciuntō
passive present labefī labefīte
future labefītō labefītō labefītōte labefīuntō
non-finite forms active passive
present perfect future present perfect future
infinitives labefacere labefēcisse labefactūrus esse labefierī labefactus esse labefactum īrī
participles labefaciēns labefactūrus labefactus labefaciendus
verbal nouns gerund supine
nominative genitive dative/ablative accusative accusative ablative
labefacere labefaciendī labefaciendō labefaciendum labefactum labefactū

Derived terms[edit]