To refer to or talk or write about something.

unwelcome or harmful matter. Questions to show understanding of a math concept.

Intended to stop something bad from happening. medicine designed to prevent disease or ill health.

in manner lacking gentleness.

gladly received. used to greet someone in polite or friendly way. instance or manner of greeting someone. To accept or receive something happily and gladly.

set of related measures. Series of classes at a college or university. To write computer code for a piece of software.

political, religious, or commercial assignment. Special assignments given to a person or group.

activity natural to or purpose of person or thing. Social events or parties, such as weddings. To be operating, working or achieving its purpose.

process or set of rules to be followed in calculations or other problem-solving operations.

of size that is less than normal or usual.

Someone whose job is to repair or maintain engines. design and build.

event or group of events.

Different, better or greater than normal. thing.

To change in pitch suddenly, as in a voice.

keep something from happening.