to zero

To make something have no effect or value

To put a device like a scale or gauge back to zero

To become successful and respected after being unknown or unsuccessful

To focus closely on a specific target

To give most attention to one person or thing

To adjust a gun or rifle so it shoots accurately at a set distance

To put a device like a scale or gauge back to zero

The place in New York City where the World Trade Center was before the 2001 terrorist attacks

A policy that makes people follow rules with no exceptions, even for small mistakes

The place where a major disaster or attack happens, often the area most affected

A strict rule that gives the same punishment for every bad act with no exceptions

A situation where one person's gain is exactly another person's loss

The lowest possible temperature when tiny particles almost stop moving

The exact time when a planned action begins

First known person infected in an outbreak who may spread the disease to others

A position on a scale where the value is zero and measurements start

The exact place on the ground most damaged by a bomb or explosion

A way to stop making trash by reusing, recycling and using fewer things

The size of all whole numbers like 0, 1, 2 and so on, the smallest infinity

Person who is the first source of a spreading trend, like a rumor or scandal

A software flaw attackers use before developers know or fix it

A possible global conflict using new kinds of attacks like hacking and harm from climate change

A bond sold at a large discount that pays no regular interest and repays full value at maturity

An investment sold for less than its full value that pays no interest until it ends

A hole in software that attackers use before developers release a fix

A loan you buy for less than its value that pays no interest until it ends

A bond sold for less than its value that pays no interest and gives the full amount when it ends