La vizo validas; aliflanke, la pasporto eksvalidiĝis.

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Breakdown of La vizo validas; aliflanke, la pasporto eksvalidiĝis.

• pasporto: the passport
• validi: to be valid
• eksvalidiĝi: to expire

Questions & Answers about La vizo validas; aliflanke, la pasporto eksvalidiĝis.

Why is validas a verb? In English, valid is usually an adjective.

In Esperanto, many roots can be used in more than one word class.

• valida = valid (adjective)
• validi = to be valid (verb)

So:

• La vizo validas. = The visa is valid.
• La vizo estas valida. = literally, The visa is valid too.

Both are correct. Using validas is a compact, natural way to say that something has validity.

Could I also say La vizo estas valida instead of La vizo validas?

Yes. Both are acceptable.

There is a slight stylistic difference:

• La vizo validas = more verbal, more direct: the visa is valid
• La vizo estas valida = more adjectival: the visa is valid

In many contexts, they mean essentially the same thing. Esperanto often allows both patterns.

What does aliflanke mean literally, and why is it one word?

Aliflanke is a compound adverb:

• ali = other, another
• flank = side
• -e = adverb ending

So literally it is something like on another side or from another side, and idiomatically it means on the other hand.

Esperanto often combines elements into a single word when they form one clear idea, so aliflanke as one word is very normal.