INFESTUOUS
In*fes"tu*ous, a. Etym: [L. infestus. See Infest, a.]

Defn: Mischievous; harmful; dangerous. [Obs.] "Infestuous as serpents." Bacon.

INFEUDATION In`feu*da"tion, n. Etym: [LL. infeudatio, fr. infeudare to enfeoff: cf. F. inféodation. See Feud a fief.]

1. (Law)

Defn: The act of putting one in possession of an estate in fee. Sir
M. Hale.

2. The granting of tithes to laymen. Blackstone.

INFIBULATION
In*fib`u*la"tion, n. Etym: [L. infibulare, infibulatum, to clasp,
buckle, or button together; pref. in- in + fibula clasp, buckle: cf.
F. infibulation.]

1. The act of clasping, or fastening, as with a buckle or padlock.

2. The act of attaching a ring, clasp, or frame, to the genital organs in such a manner as to prevent copulation.

INFIDEL In"fi*del, a. Etym: [L. infidelis; pref. in- not + fidelis faithful, fr. fides faith: cf. F. infidèle. See Fidelity.]