"The coach did not kick the athlete."

Translation: Ο προπονητής δεν κλώτσησε τον αθλητή.

[I.Schmidt1]

Η προπονητής δεν κλώτσησε την αθλήτρια. why is this wrong -
an athleten can be woman or man

[troll1995]

It's wrong because of the η προπονητής. The feminine is η προπονήτρια.

[I.Schmidt1]

thank you

[airmiki]

shouldn't be "τον αθλητον" ?

[mizinamo]

shouldn't be "τον αθλητον" ?

No. It's not ο αθλητός (2nd declension), after all, but ο αθλητής (1st declension), so the accusative is τον αθλητή, not τον αθλητό.

(And keeping the final -ν in the accusative of a noun is Ancient Greek.)

[airmiki]

maybe i am missing something about this declension you mentioned. Could you please share a link where i can read a bit more about this? or just tell me what i should look for. thanks a lot!

[airmiki]

https://www.foundalis.com/lan/grknouns.htm , i ve read more about it. i think i got it, thanks =)