This is the 1620th most frequent German word.
tut
"Tut" means "does" or "makes" in English.
Here 'tut' is the third-person singular of 'tun,' indicating the action of exercising.
Er tut jeden Morgen Sport.
He exercises every morning.
In this phrase, 'tut' is part of a fixed expression 'Es tut mir leid,' meaning 'I am sorry.'
Es tut mir leid.
I am sorry.
Here 'tut' represents the third-person singular of 'tun,' expressing the action of pretending or acting.