"We walked through the dense forest."

Translation: Ni promenis tra la densa arbaro.

[JamesTWils]

Doesn't "tra" take the accusative when one completely crosses through something? Am I just too optimistic?

[jxetkubo]

Tra already means to cross something completely. The n-ending means the the motion continues outside. But this can also be the meaning of the form without n. The n-form is used only if it really matters that the motion continues.

[JamesTWils]

So, then, this sentence should make sense with the accusative. I was actually thinking, honestly, of soldiers having to cross a dense forest (I was putting together an ancient history course at the time). I would have suggested that it should have been accepted, but I just was not sure.

[salivanto]

I just answered the same question on the same sentence in a different thread just this morning.

Reply to JamesTWils.

[EdwinWisse]

I thought 'arbaro densa' would be ok too since the order is not prescribed. But duolingo marks it wrong. Is 'densa arbaro' the only right option?

[jengaship]

It's much more common to use the adjective first unless for deliberate emphasis. But it's not incorrect so it should be reported.