This is the 470th most frequent Estonian word.
tõus
"Rise" or "ascent."
In this sentence, 'tõus' refers to the act of rising, specifically the sunrise.
Päikese tõus on hommikul imeline vaatepilt.
The sunrise is a wonderful sight in the morning.
In this usage, 'tõus' represents a surge or increase, in this case referring to a rise in energy levels.
Energiatõus võimaldas tal tööpäeva edukalt lõpetada.
A surge of energy allowed him to successfully complete the workday.
Here, 'tõus' is used to describe an increase or rise, specifically in a metaphorical sense pertaining to prices.