| appreciate |
to be grateful for or to. |
| avenge |
to inflict punishment or cause suffering as retribution for. |
| commerce |
the buying and selling of goods or services; trade; business. |
| confidence |
a sense of trust or faith in a person or thing, or in oneself. |
| converge |
to move toward or meet at a common point. |
| conversion |
the changing of a person's religious beliefs. |
| engineering |
the study and practice of using scientific and mathematical knowledge to do practical things. Knowledge of engineering is needed to design and build roads, bridges, tools, and machines. |
| ensemble |
a group of performers, such as actors or musicians, who perform together. |
| internal |
located on the inside; inner. |
| maintain |
to continue; keep in existence. |
| periodic |
happening or appearing at regular times. |
| phenomenon |
a happening or fact that can be seen or known through the senses. |
| revive |
to bring back into use or popularity. |
| simplify |
to make plainer, easier, or less complex. |
| valve |
a device that controls the flow of a liquid or gas through a pipe or tube. |