v. t. [ imp. & p. p. Impenned nd Impent p. pr. & vb. n. Impenning. ] To shut up or inclose, as in a pen. Feltham. [ 1913 Webster ]

v. t. [ L. impend&ebreve_;re; pref. im- in + pend&ebreve_;re to weigh out, pay. ] To pay. [ Obs. ] Fabyan. [ 1913 Webster ]

v. i. [ imp. & p. p. Impended; p. pr. & vb. n. Impending. ] [ L. impendēre; pref. im- in + pendēre to hang. See Pendant. ] To hang over; to be suspended above; to threaten from near at hand; to menace; to be imminent. See Imminent. [ 1913 Webster ]

Destruction sure o'er all your heads impends. Pope.

{ } n. The state of impending; the state of being imminent and liable to happen soon; also, that which impends. “Impendence of volcanic cloud.” Ruskin.
Syn. -- imminence, imminency, impendence, forthcomingness. [ 1913 Webster ]

a. [ L. impendens, p. pr. of impendēre. ] Impending; threatening. [ 1913 Webster ]

Impendent horrors, threatening hideous fall. Milton. [ 1913 Webster ]

a. Hanging over; overhanging; suspended so as to menace; imminet; threatening. [ 1913 Webster ]

An impending brow. Hawthorne. [ 1913 Webster ]

And nodding Ilion waits th' impending fall. Pope.

Syn. -- Imminent; threatening. See Imminent. [ 1913 Webster ]

n. [ Cf. F. impénétrabilité. ] 1. Quality of being impenetrable. [ 1913 Webster ]

2. (Physics) That property in virtue of which two portions of matter can not at the same time occupy the same portion of space. [ 1913 Webster ]

3. Insusceptibility of intellectual or emotional impression; obtuseness; stupidity; coldness. [ 1913 Webster ]

a. [ L. impenetrabilis; pref. im- not + penetrabilis penetrable: cf. F. impénétrable. ] 1. Incapable of being penetrated or pierced; not admitting the passage of other bodies; not to be entered; impervious; as, an impenetrable shield. [ 1913 Webster ]

Highest woods impenetrable
To star or sunlight. Milton. [ 1913 Webster ]

2. (Physics) Having the property of preventing any other substance from occupying the same space at the same time. [ 1913 Webster ]

3. Inaccessible, as to knowledge, reason, sympathy, etc.; unimpressible; not to be moved by arguments or motives; as, an impenetrable mind, or heart. [ 1913 Webster ]

They will be credulous in all affairs of life, but impenetrable by a sermon of the gospel. Jer. Taylor. [ 1913 Webster ]

n. The quality of being impenetrable; impenetrability. [ 1913 Webster ]

adv. In an impenetrable manner or state; imperviously. “Impenetrably armed.” Milton. “Impenetrably dull.” Pope. [ 1913 Webster ]

n. [ L. impenitentia: cf. F. impénitence. ] The condition of being impenitent; failure or refusal to repent; hardness of heart. [ 1913 Webster ]

He will advance from one degree of wickedness and impenitence to another. Rogers. [ 1913 Webster ]

n. Impenitence. Milton. [ 1913 Webster ]

a. [ L. impaenitens; pref. im- not + paenitens penitens: cf. F. impénitent. See Penitent. ] Not penitent; not repenting of sin; not contrite; of a hard heart. “They . . . died impenitent.” Milton. “A careless and impenitent heart.” Bp. Hall. [ 1913 Webster ]

n. One who is not penitent. [ R. ] [ 1913 Webster ]

adv. Without repentance. [ 1913 Webster ]

a. (Zool.) Characterized by short wings covered with feathers resembling scales, as the penguins. -- n. One of the Impennes. [ 1913 Webster ]

‖n. pl. [ NL., fr. L. pref. im- not + penna feather. ] (Zool.) An order of birds, including only the penguins, in which the wings are without quills, and not suited for flight. [ 1913 Webster ]

pos>a. [ L. pref. im- not + penna wing. ] (Zool.) Having no wings, as some insects. [ 1913 Webster ]