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2 : incapable of being wearied or worn out : UNTIRING

— in·ex·haust·ibly adverb

Synonyms

indefatigable, tireless, unflagging, untiring—more at TIRELESS

in·ex·o·ra·ble adjective : not to be moved by entreaty : RELENTLESS

— in·ex·o·ra·bly adverb

in·ex·pen·sive adjective : reasonable in price

in·ex·pe·ri·ence noun : lack of experience or of knowledge gained by experience

in·ex·pe·ri·enced adjective : lacking practical experience

Synonyms

amateur, amateurish, inexpert, nonprofessional, unprofessional, unskilled, unskillful—more at AMATEURISH

in·ex·pert adjective : not expert : UNSKILLED

— in·ex·pert·ly adverb

Synonyms

amateur, amateurish, inexperienced, nonprofessional, unprofessional, unskilled, unskillful—more at AMATEURISH

in·ex·pi·a·ble adjective : not capable of being atoned for

in·ex·pli·ca·ble adjective : incapable of being explained or accounted for

— in·ex·pli·ca·bly adverb

in·ex·press·ible adjective : not capable of being expressed

— in·ex·press·ibly adverb

Synonyms

indescribable, ineffable, nameless, unspeakable, unutterable—more at INDESCRIBABLE

in·ex·pres·sive adjective : lacking expression or meaning

Synonyms

blank, deadpan, expressionless, impassive, stolid, vacant—more at BLANK

in ex·tre·mis adverb : in extreme circumstances; especially : at the point of death

in·ex·tri·ca·ble adjective 1 : forming a maze or tangle from which it is impossible to get free

2 : incapable of being disentangled or untied

— in·ex·tri·ca·bly adverb

inf abbreviation 1 infantry

2 infinitive

in·fal·li·ble adjective 1 : incapable of error : UNERRING

2 : not liable to mislead, deceive, or disappoint : SURE, CERTAIN

— in·fal·li·bil·i·ty noun

— in·fal·li·bly adverb

Synonyms

certain, sure, unfailing; also dependable, reliable, surefire; deadly, unerring

Antonyms

fallible

in·fa·mous adjective 1 : having a reputation of the worst kind

2 : causing or bringing infamy : DISGRACEFUL

— in·fa·mous·ly adverb

Synonyms

[1, 2] discreditable, disgraceful, dishonorable, disreputable, ignominious, notorious, shameful—more at DISREPUTABLE

in·fa·my noun, plural -mies 1 : evil reputation brought about by something grossly criminal, shocking, or brutal

2 : an extreme and publicly known criminal or evil act

3 : the state of being infamous

Synonyms

discredit, disgrace, dishonor, disrepute, ignominy, odium, opprobrium, reproach, shame—more at DISGRACE

in·fan·cy noun, plural -cies 1 : early childhood

2 : a beginning or early period of existence

in·fant noun [ORIGIN: ME enfaunt, fr. AF enfant, fr. L infant-, infans, adj., incapable of speech, young, fr. fant-, fans, prp. of fari to speak]

: a child in the first period of life : BABY; also : a person who is a legal minor

Synonyms

baby, child, newborn—more at BABY

in·fan·ti·cide noun : the killing of an infant

in·fan·tile adjective : of or relating to infants; also : CHILDISH

Synonyms

adolescent, babyish, childish, immature, juvenile, kiddish—more at CHILDISH

infantile paralysis noun : POLIOMYELITIS

in·fan·try noun, plural -tries [ORIGIN: MF & It; MF infanterie, fr. It infanteria, fr. infante boy, foot soldier]

: soldiers trained, armed, and equipped to fight on foot

— in·fan·try·man noun

in·farct noun [ORIGIN: L infarctus, pp. of infarcire to stuff]

: an area of dead tissue (as of the heart wall) caused by blocking of local blood circulation

— in·farc·tion noun

in·fat·u·ate verb -at·ed; -at·ing : to inspire with a foolish or extravagant love or admiration

— in·fat·u·a·tion noun

in·fect verb 1 : to contaminate with disease-producing matter

2 : to communicate a pathogen or disease to

3 : to cause to share one's feelings

in·fec·tion noun 1 : a disease or condition caused by a germ or parasite; also : such a germ or parasite

2 : an act or process of infecting

— in·fec·tive adjective

in·fec·tious adjective 1 : capable of causing infection; also : communicable by infection

2 : spreading or capable of