This is the 620th most frequent Ukrainian word.
різко
Sharply.
In this sentence, 'різко' means abruptly or suddenly, describing the manner in which she stood up.
Вона різко піднялась з місця.
She stood up abruptly from her seat.
Here, 'різко' conveys the meaning of sharply, providing information on how the temperature dropped.
Температура різко впала протягом ночі.
The temperature dropped sharply during the night.
In this context, 'різко' means harshly or sternly, characterizing the manner in which the remark sounded.