Learn Polish: Miło było cię poznać. - It was nice to meet you.

In Polish, impersonal expressions that describe a general feeling or state (like "it is nice" or "it was cold") use an adverb rather than an adjective. Because there is no specific noun being described, we use the adverb miło.

Why is the verb było in the neuter form here?

Sentences without a specific subject use the third-person singular neuter form in the past tense. Since the English "it" in "it was nice" doesn't refer to a specific noun in Polish, the neuter było is the default choice.

Why do we use the short pronoun cię instead of ciebie?

cię is the short, unstressed form of "you" in the accusative case. We use it when we don't need to put special emphasis on the pronoun. You would only use the long form ciebie if you wanted to stress "It was nice to meet you (and not someone else)".

Could I change the word order and put cię at the end of the sentence?

It would be understood, but it sounds a bit unnatural. Short pronouns like cię like to hide in the middle of a sentence and generally should not be placed at the very end if it can be avoided.

Why is the perfective verb poznać used instead of the imperfective poznawać?