to change a trend, situation, or outcome to its opposite, often resulting in a comeback

showing a desire to resist authority, control, or convention, especially in a social or psychological context

difficult or unfavorable circumstances; a predicament

acting or considering things in a contrary or reverse order or logic

to move in a direction opposite to the general movement or trend, often used to describe heroic actions in the face of danger

trade deficit; adverse trade balance

having an inverse, specifically referring to mathematical functions or matrices

an adverse trade balance where a country's imports exceed its exports

water flowing against the main stream or an adverse current

a wind blowing from the direction directly opposite to the course of a moving object

moving in the opposite direction to the hands of a clock

backlighting; light coming from behind the subject (especially in photography)

behavior that is unfilial, rebellious or in grave breach of the norms of society

to resign oneself to adversity or hardship with endurance

to go against the historical tide or the will of the people

contrary in position, order, or direction; reverse or inverse

to have a hiccup; a spasmodic, involuntary contraction of the diaphragm

to sail, swim, or move against the physical current of a body of water

navigating a boat against the water's current

a rebel or lawless insurgent who commits crimes against the state

disobedient to one's parents

moving or situated against the direction of a water current

a guest house or lodging place for travelers

to disobey a command or defy the will of a superior or elder

traitor; rebel

unpleasant to hear, particularly in the context of honest advice or harsh truths

contrary; rebellious

bosom buddies or very close friends who share a deep, unbreakable bond

loyal advice jars on the ears (idiom)

to predict or anticipate what will happen in the future

A geological fault where compressional forces push one block of the earth's crust up and over another.

Unpleasant but honest remarks or advice that are difficult for the listener to accept.

an opposing or inverse response to a specific action, stimulus, or psychological influence

submit to me and prosper, or oppose me and perish

converse theorem (math.)

A mathematical or logical process that reverses or undoes another operation.

an abnormal birth position where the baby is delivered feet or buttocks first

taboo relationships or extreme crimes against family members, such as incest or parricide

inverse map (mathematics)

to act in a manner contrary to the proper order; to do things in a backwards or wrongheaded way

of an underdog, to achieve unexpected success or rise to prominence from a disadvantaged position

multiplicative inverse (math.)

belching and retching counterflow (medical term)

study is like rowing upstream – if you don't keep pushing forward, you fall behind

to go against or act contrary to someone's wishes or expectations