super- and ultra-
sub- and under-
anti- and inter-
trans- and semi-
aud
100

an extraordinary, superhuman ability

superpower

100

to take away one number, quantity, or part from another to find the remaining amount or difference

subtract

100

any product, procedure, or lifestyle strategy used to prevent, slow down, or lessen the physical, aesthetic, or biological effects of aging

antiaging

100

to move, shift, or convey something or someone from one place, person, vehicle, or situation to another.

transfer

100

to show approval, enjoyment, or praise—either by clapping your hands together or by expressing formal admiration for someone's actions, decisions, or performance

applaud

200

a noninvasive imaging test that uses high-frequency sound waves to create real-time pictures or videos of internal organs, tissues, and blood vessels inside the body

ultrasound

200

earning less money than normal, required, or deserved for the work, role, experience, and location

underpaid

200

to break into someone's conversation, activity, or train of thought, or to temporarily stop a process or event from continuing

interrupt

200

a one-dimensional or two-dimensional shape that forms exactly half of a circle, created by cutting a full circle along its diameter

semicircle

200

a group of people who gather or tune in to watch, listen to, or read a performance, speech, movie, broadcast, or written work

audience

300

sound waves or mechanical vibrations that have a frequency higher than the upper limit of human hearing

ultrasonic

300

to include, absorb, or place something smaller or more specific into a larger, more comprehensive category or system

subsume

300

a main protagonist in a story who lacks traditional heroic qualities

antiheroic

300

a substance with a consistency and viscosity that falls between a solid and a liquid

semisolid

300

a short performance given by an actor, dancer, musician, or other performer so that a director, conductor, or casting team can test their skills and decide if they are right for a role, group, or program

audition

400

to take the place of, replace, or force out something older, inferior, or outdated

supersede

400

a performer in a theatrical production who learns the lines, music, blocking, and choreography of another actor's role so they can step in as a replacement if the primary actor is sick, injured, or otherwise unavailable

understudy

400

an intentional action or step taken to step into a difficult situation, process, or condition to improve an outcome, prevent harm, or stop things from getting worse

intervention

400

to send, pass, or convey something—such as information, signals, physical energy, or a disease—from one person, place, or medium to another

transmit

400

unable to be heard

inaudible

500

something that exists, happens, or originates outside the normal observable laws of the physical universe and cannot be explained by science

supernatural

500

to go below the surface of water or another liquid, or to put something completely under water

submerse

500

a collection of federal and state laws designed to promote fair market competition, prevent monopolies, and stop companies from engaging in anti-competitive business practices

antitrust

500

allowing light to pass through so that objects on the other side can be clearly seen, or acting in an open, honest, and easy-to-understand way without hidden motives

transparent

500

a specialized electronic medical device used to measure a person's hearing acuity

audiometer