This is the 218th most frequent Hungarian word.
tud
"To know" or "can" (expressing ability).
Here, 'tud' indicates the ability or skill to perform an activity.
Ő tud zongorázni.
She knows how to play the piano.
In this sentence, 'tudom' (from 'tud') expresses knowledge or awareness of information.
Nem tudom, milyen idő lesz holnap.
I don't know what the weather will be like tomorrow.
Here, 'tudsz' (from 'tud') is used in the context of a polite request or asking for assistance.