12-letter words containing f, r, i, n
- infiltrators — Plural form of infiltrator.
- inflammatory — tending to arouse anger, hostility, passion, etc.: inflammatory speeches.
- inflationary — of, pertaining to, reflective of, or causing inflation: inflationary prices.
- inflorescent — Of, pertaining to or causing inflorescence.
- infographics — Plural form of infographic.
- infomercials — Plural form of infomercial.
- informations — (legal) Plural form of information.
- informercial — infomercial.
- informidable — (obsolete) Not formidable; not to be feared or dreaded.
- infraclasses — Plural form of infraclass.
- infraduction — (medicine) The turning downward of a part, especially of the eye.
- infrakingdom — (taxonomy) A taxonomic category sometimes inserted below subkingdom.
- inframammary — (anatomy) Below the breast.
- infraorbital — (anatomy) Below the orbit (of the eye).
- infrequently — happening or occurring at long intervals or rarely: infrequent visits.
- infringement — a breach or infraction, as of a law, right, or obligation; violation; transgression.
- infundibular — a funnel-shaped organ or part.
- insufferable — not to be endured; intolerable; unbearable: their insufferable insolence.
- insufferably — not to be endured; intolerable; unbearable: their insufferable insolence.
- intensifiers — Plural form of intensifier.
- inter-office — functioning or communicating between the offices of a company or organization; within a company: an interoffice memo.
- interdiffuse — (of two or more fluids) to diffuse mutually
- interfaculty — an ability, natural or acquired, for a particular kind of action: a faculty for making friends easily.
- interfemoral — situated between the thighs
- interference — an act, fact, or instance of interfering.
- interfertile — able to interbreed.
- interfilling — a filling of materials, as brickwork between studs.
- interfluence — the action of flowing together or merging
- interfoliate — to interleave
- interfretted — interlaced
- interfrontal — situated between the frontal bones
- interleafing — Present participle of interleaf.
- intertraffic — traffic between two or more places or people
- iron foundry — ironworks, forgery
- iron sulfate — ferrous sulfate.
- irreflection — lack of careful or long consideration
- jeffersonian — pertaining to or advocating the political principles and doctrines of Thomas Jefferson, especially those stressing minimum control by the central government, the inalienable rights of the individual, and the superiority of an agrarian economy and rural society.
- jeffersonite — (mineralogy) A variety of pyroxene of olive-green color passing into brown. It contains zinc.
- jeffrey pine — a conifer, Pinus jeffreyi, of high mountains in the western U.S., having long needles, large cones, and aromatic bark.
- kentish fire — prolonged clapping by an audience, especially in unison, indicating impatience or disapproval.
- khyber knife — a long Indian knife having a triangular, single-edged blade with the handle set off center toward the back.
- king-of-arms — a title of certain of the principal heralds of England and certain other kingdoms empowered by their sovereigns to grant armorial bearings.
- korsakoffian — relating to or suffering from Korsakoff's psychosis
- krafft-ebing — Richard [rich-erd;; German rikh-ahrt] /ˈrɪtʃ ərd;; German ˈrɪx ɑrt/ (Show IPA), Baron von, 1840–1902, German neurologist and author of works on sexual pathology.
- kupfernickel — (archaic) cupronickel.
- laminar flow — the flow of a viscous fluid in which particles of the fluid move in parallel layers, each of which has a constant velocity but is in motion relative to its neighboring layers.
- lantern fish — any of several small, deep-sea fishes of the family Myctophidae, having rows of luminous organs along each side, certain species of which migrate to the surface at night.
- leapfrogging — Present participle of leapfrog.
- left-brained — having the left brain dominant, therefore being more adept at logic, calculation, language, and other thought processes or skills usually associated with the left brain.
- leif ericson — Leif [leef;; Icelandic leyv] /lif;; Icelandic leɪv/ (Show IPA), flourished a.d. c1000, Norse mariner: according to Icelandic saga, discoverer of Vinland (son of Eric the Red).