informal, a. [unceremonious], unconventional, [easy], [natural], [unconstrained].
informality, n. unceremoniousness.
information, n. [knowledge], [intelligence], [instruction]; (Law) [complaint], [accusation].
infringe, v. [violate], [transgress]; [encroach], [trespass], intrench.
infringement, n. [transgression], [violation], [breach], [encroachment], [trespass], [intrenchment].
in full. unabridged, at length.
ingenious, a. inventive, resourceful.
ingratitude, n. [unthankfulness].
ingredient, n. constituent, [element], component, [part].
inhabitant, n. [dweller], denizen, residentiary, [resident], [citizen]. Antonyms: sojourner, [pilgrim], [visitor].