"Azon az ágyon nincsenek puha párnák, csak kemények."

Translation: There are no soft pillows on that bed, only hard ones.

[Werrettich]

Hovering over kemények only shows "tough" whereas "hard" is the correct answer

[vvsey]

Yes, it should be corrected. "Kemény" can be "tough" (a tough guy) or "hard" (as opposed to soft). But "hard" (difficult) is "nehéz" (as opposed to "könnyű" - "easy"). But "nehéz" is also "heavy" (in weight). And "könnyű" is also "light" (in weight). But "light" is also what comes from the Sun: "fény". I better stop now.

[deactivated user]

The translation hint says "tough" ... ?

[Daniel939761]

Why is puha not pluralized but kemén is?

[BaloghTams19]

Because originally "kemény párnák" are shortly "kemények", like "hard ones".

[Sophie413148]

puha párnák. .... párnák puhák. ...