This is the 289th most frequent Czech word.
údajně
Allegedly.
The word 'údajně' here implies that this information is not confirmed but rather suggested by rumors or unverified sources.
Údajně si koupil novou vilu poblíž centra.
He allegedly bought a new villa near the city center.
Here, 'údajně' is used to indicate that the statement is based on unconfirmed reports or hearsay.
Údajně tam byl, když se to stalo.
Allegedly, he was there when it happened.
In this sentence, 'údajně' conveys that the effect of the medicine is reported but not guaranteed.