almost wrote "where are the wheels of that plant" but something about that just didn't seem right

Hm, they're just... gone.

Could someone explain 'radikoj' meaning roots?

Roots radikoj. Confirmed. Dr Z was a punk rocker. Donu (?) al ili la boton!

Is the word "tiu" correct here????

Why is "This" accepted?

Where does "radiko" come from? And how do I get to know an Esperanto word's origin?