Meaning
Usage

"Iconoclast" - (noun) 

one who attacks common beliefs or institutions

Example: Jane goes to one protest after another, but she seems to be an iconoclast rather than an activist with a progressive agenda.

excessively worshipping one object or person

Example: Xena’s idolatrous fawning over the band—following them on tour, starting their fan club, filming their documentary—is really beginning to get on my nerves.

not changeable

Example: The laws of physics are immutable and constant.

exemplary, flawless

Example: If your grades were as impeccable as your sister’s, then you too would receive a car for a graduation present.

rude, insolent

Example: Most of your comments are so impertinent that I don’t wish to dignify them with an answer.

rash; hastily done

Example: Hilda’s hasty slaying of the king was an impetuous, thoughtless action.

incapable of being appeased or mitigated 

Example: Watch out: once you shun Grandma’s cooking, she is totally implacable.

to involve in an incriminating way, incriminate

Example: Even though Tom wasn’t present at the time of the shooting, he was implicated by the evidence suggesting that he had supplied the shooters with guns.

"Impregnable" - (adjective) 

resistant to capture or penetration

Example: Though the invaders used battering rams, catapults, and rain dances, the fortress proved impregnable and resisted all attacks.

"Impute" - (verb) 

to ascribe, blame

Example: The CEO imputed the many typos in the letter to his lazy secretary.

incapable of expressing oneself clearly through speech

Example: Though he spoke for over an hour, the lecturer was completely inarticulate and the students had no idea what he was talking about.

"Incessant" - (adjective) 

unending

Example: We wanted to go outside and play, but the incessant rain kept us indoors for two days.

clear, sharp, direct

Example: The discussion wasn’t going anywhere until her incisive comment allowed everyone to see what the true issues were.

indisputable

Example: Only stubborn Tina would attempt to disprove the incontrovertible laws of physics.)

an enlargement; the process of increasing

Example: The workmen made the wall longer, increment by increment.

incapable of defeat, failure, decay

Example: Even after traveling 62 miles, the indefatigable runner kept on moving.

very poor, impoverished

Example: I would rather donate money to help the indigent population than to the park sculpture fund.

"Indolent" - (adjective) 

lazy

Example: Why should my indolent children, who can’t even pick themselves up off the couch to pour their own juice, be rewarded with a trip to the mall?

"Induce" - (verb) 

to bring about, stimulate

Example: Who knew that our decision to boycott school lunch would induce a huge riot?

not suitable or capable, unqualified

Example: She proved how inept she was when she forgot three orders and spilled a beer in a customer’s lap.