Learn Romanian: Aici este un creion.

In Romanian, nouns have genders. creion is a neuter noun, which means it acts like a masculine noun when there is just one, and a feminine noun when there are multiple. Because there is only one pencil here, it takes the masculine/neuter indefinite article un instead of the feminine o.

Does un mean 'a' or 'one'?

It can mean both! In Romanian, the indefinite article un (and its feminine counterpart o) also serves as the number one. You would use the exact same sentence to say 'Here is one pencil.'

Is este used here to mean 'is' or 'it is'?

Here it simply means 'is', matching the English structure perfectly: Aici (Here) este (is) un creion (a pencil). Romanian often drops subject pronouns like 'it', but in this specific sentence, the words line up exactly with English.

Could I say Este un creion aici instead of Aici este un creion?

Yes! Romanian word order is very flexible. Putting Aici at the beginning just emphasizes the location, much like saying 'Here is a pencil' versus 'A pencil is here.'