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infantry soldiers on foot, or the branch of the military to which they belong.
infatuated having an attraction to someone or something that is strong enough to take away one's good judgment.
in favor of in support of.
infect to spread germs or disease to.
infection the act of infecting or an instance or condition of being infected. [2 definitions]
infectious able to be given to others by infection. [2 definitions]
infer to make a guess based on facts and observations; conclude.
inferior lower in rank, position, or degree. [2 definitions]
infertile not able to produce crops. [2 definitions]
infield a baseball diamond, the positions at the four corners of the diamond, or the people playing those positions as a group.
infiltrate to enter into in secret.
infinite having no limits or end; without measure.
infinitive the simple form of a verb that has no subject and does not show past, present or future tense. It is usually formed by the word "to" followed by the base form of a verb. In the sentence, "I want to leave now," "to leave" is an infinitive.
infirm weak or ill, as from old age.
inflame to stir up or intensify. [3 definitions]
inflammable able to catch fire and burn, or easy to set on fire and burn; flammable.
inflammation a small area of tissue that is hot, red, swollen, and sore because of infection or injury.
inflate to make larger or expand. [2 definitions]
inflation an increase in the average price level. [2 definitions]
inflection a change in the pitch or tone of a voice. [3 definitions]
inflexible not able to be bent, or not easy to bend; stiff. [3 definitions]