This is the 255th most frequent Estonian word.
seetõttu
"Therefore" or "for that reason."
This usage demonstrates how 'seetõttu' is employed to present a conclusion or result derived from the preceding statement: the delay in the bus caused the speaker to stay home waiting.
Tulin täna hiljem tööle, sest buss hilines ja seetõttu jäin koju ootama.
I came to work late today because the bus was delayed and therefore I stayed at home waiting.
Here, 'seetõttu' connects the first clause (renovation) with the result (postponement of classes), showing causality.
Koolis toimus mahukas remont, seetõttu lükati tunnid edasi.
There was extensive renovation at the school, therefore classes were postponed.
In this context, 'seetõttu' is used at the beginning of the sentence to introduce a conclusion drawn from a previously discussed situation or reasoning.