expert in or student of physics.

person qualified to treat sick people. People paid to help people become or stay healthy. To change something in order to trick someone.

arousing curiosity or interest. To persuade to do, become involved with something.

achieved or maintained by careful and deliberate effort. To focus on learning something usually at school.

the principal method of human communication, consisting of words used in a structured and conventional way and conveyed by speech, writing, or gesture. Words or signs used to communicate messages.

contact with facts or events. encounter event or occurrence.

person's regular occupation etc..

To focus on one area of a field or profession.

make idea or situation clear to someone by describing it in more detail.

Being what was wanted or needed. used to greet someone in polite or friendly way. instance or manner of greeting someone. To greet someone who has just arrived.

occupation, profession, or work of teacher. To help someone learn or do something.

professional person. Highly qualified people, e.g. lawyers or doctors.

sentence worded or expressed so as to elicit information. To have or express concerns or uncertainty.

acquisition of knowledge or skills through study. To get knowledge or skills by study or experience.

Connected to; in association with. To understand or sympathize with, e.g. a problem.