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— in·va·lid·i·ty noun

— in·val·id·ly adverb

Synonyms

baseless, groundless, unfounded, unreasonable, unsubstantiated, unsupported, unwarranted—more at BASELESS

null, void—more at NULL

erroneous, false, inaccurate, incorrect, inexact, off, unsound, untrue, wrong—more at FALSE

2invalid adjective : being in ill health : SICKLY

3invalid noun : a person in usu. chronic ill health

— in·va·lid·ism noun

4invalid verb 1 : to remove from active duty by reason of sickness or disability

2 : to make sickly or disabled

in·val·i·date verb : to make invalid; especially : to weaken or make valueless

— in·val·i·da·tion noun

Synonyms

abolish, abrogate, annul, cancel, dissolve, negate, nullify, quash, repeal, rescind, void—more at ABOLISH

in·valu·able adjective : valuable beyond estimation

in·vari·able adjective : not changing or capable of change : CONSTANT

in·vari·ably adverb : on every occasion

Synonyms

always, constantly, continually, ever, forever, incessantly, perpetually, unfailingly—more at ALWAYS

in·va·sion noun : an act or instance of invading; especially : entry of an army into a country for conquest

Synonyms

descent, foray, incursion, irruption, raid—more at RAID

in·va·sive adjective 1 : tending to spread <~ cancer cells>

2 : involving entry into the living body (as by surgery) <~ therapy>

in·vec·tive noun 1 : an abusive expression or speech

2 : abusive language

— invective adjective

Synonyms

abuse, fulmination, vitriol, vituperation—more at ABUSE

in·veigh verb : to protest or complain bitterly or vehemently : RAIL

in·vei·gle verb in·vei·gled; in·vei·gling [ORIGIN: AF enveegler, aveogler to blind, hoodwink, fr. avogle, enveugle blind, fr. ML ab oculis, lit., lacking eyes]

1 : to win over by flattery : ENTICE

2 : to acquire by ingenuity or flattery

in·vent verb 1 : to think up

2 : to create or produce for the first time

Synonyms

[1, 2] concoct, contrive, cook, devise, fabricate, make up, manufacture, think; also coin, contrive, create, design, hatch, produce; daydream, dream, fantasize; conceive, envisage, imagine, picture, visualize

in·ven·tion noun 1 : productive imagination : INVENTIVENESS

2 : a creation of the imagination; especially : a false conception

3 : a device, contrivance, or process originated after study and experiment

4 : the act or process of inventing

Synonyms

[1] creativity, fancy, fantasy, imagination, inventiveness—more at IMAGINATION

[2] fabrication, fantasy, fiction, figment, invention—more at FICTION

[3] coinage, concoction, contrivance, creation, innovation, wrinkle; also contraption, device, gadget, gizmo, novelty; design, product, work; dream, fantasy, picture, vision; conception, imagining

in·ven·tive adjective 1 : adept or prolific at producing inventions : CREATIVE, INGENIOUS

2 : characterized by invention

Synonyms

creative, imaginative, ingenious, innovative, original—more at CREATIVE

in·ven·tive·ness noun : the quality or state of being inventive

Synonyms

creativity, ingenuity, invention, originality—more at CREATIVITY

in·ven·tor noun : one that invents: as

a : one that conceives by creative imagination

b : one that creates a new device or process

Synonyms

designer, developer, innovator, originator; also author, creator, father, founder, originator; pioneer, researcher; builder, maker, producer; dreamer

1inventory noun, plural -ries 1 : an itemized list of current goods or assets

2 : SURVEY, SUMMARY

3 : STOCK, SUPPLY

4 : the act or process of taking an inventory

2inventory verb -ried; -ry·ing : to make an inventory of

Synonyms

enumerate, itemize, list, numerate—more at LIST

1inverse adjective : opposite in order, nature, or effect : REVERSED

— in·verse·ly adverb

2inverse noun : something inverse or resulting in or from inversion : OPPOSITE

in·ver·sion noun 1 : a reversal of position, order, or relationship; especially : an increase of temperature with altitude through