fence or other obstacle that prevents movement or access. Difficult situations preventing something happening.

To change in pitch suddenly, as in a voice.

person engaged in postdoctoral research. A scholar or researcher who is involved in academic study beyond the level of a doctoral degree.

succeed in dealing with.

The act of composing letters on paper. To invent or create a computer program. To compose letters and words on paper or a screen.

unwelcome or harmful matter. Some things difficult to deal with or causes troubles.

find answer to, explanation for, or means of effectively dealing with.

result or effect. Outcomes of an event; results.

Received directly from a source. from original source.

Easily affected, broken, or harmed.

Being the strongest physically or mentally.

occupation or activity of preparing and issuing books. To release information to the general public.

invitation to compete/fight. Questions to determine correctness of some things. invite to join in contest.

so as to give impression of having certain quality.

set down in writing or some other permanent form for later reference. To indicate a temperature, speed, etc.; register.