Lewis & Short

Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.

1. infirmo, āvi, ātum, 1, v. a. and n. [infirmus].

  1. I. Act., to deprive of strength, to weaken, enfeeble.
    1. A. Lit.: legiones, Tac. A. 15, 10: munimenta madore, Sall. Fragm. ap. Non. 138, 6: hominem, Cels. 2, 12.
    2. B. Trop.
        1. a. To invalidate, disprove, refute: res tam leves infirmare ac diluere, Cic. Rosc. Am. 15, 42; with tollere, id. N. D. 2, 59, 147; with frangere, id. de Or. 131: fidem testis, id. Rosc. Com. 15, 45: fidem alicui, id. Att. 15, 26.
        2. b. To annul, make void: legem, Liv. 34, 3; Quint. 7, 1, 49: contractum, Dig. 49, 14, 46: graviter ferens aliquid a se factum infirmari, Vell. 2, 2, 1: acta illa atque omnes res superioris anni, Cic. Sest. 18, 40.
  2. II. Neutr. only in part. pres. as subst.: infirmantes, um, m., the weak, sick, Sulp. Sev. Vit. S. Mart. 18, 5; id. Ep. 2, 12.

2. in-firmo, āvi, ātum, 1, v. a., to establish in, fix, or confirm in (late Lat.), Cael. Aur. Acut. 3, 4, 36.