| combination |
the result of an act of putting things together or mixing them. |
| deepen |
to make or become deep or deeper. |
| exclaim |
to speak suddenly and with strong feeling. |
| heckle |
to bother a public speaker or performer by saying rude things or asking annoying questions. |
| investigation |
the act of examining carefully and closely. |
| multiple |
having or made of more than one part; many. |
| option |
the right, power, or freedom to choose. |
| physics |
the science that deals with matter and energy, their qualities, and the relationships between them. It includes the study of light, heat, sound, electricity, and force. (The word is used with a singular verb.) |
| reign |
rule by a king or queen. |
| requirement |
something that is needed or necessary. |
| solid |
having a firm shape or form that can be measured in length, width, and height; not like a liquid or a gas. |
| stub |
a short part that sticks out; stump. |
| sympathy |
kind understanding and concern for others when they are sad, suffering, or having trouble. |
| tourism |
the act of traveling, usually for sightseeing or relaxing. |
| trait |
a characteristic or quality that makes a person or animal different from others. |