Mój kolega wygląda na zmęczonego.

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Breakdown of Mój kolega wygląda na zmęczonego.

• wyglądać: to look
• kolega: the friend
• zmęczony: tired

Questions & Answers about Mój kolega wygląda na zmęczonego.

Why is it mój and not moja or moje?

Because mój has to agree with kolega, and kolega is a masculine noun.

Even though kolega ends in -a, it refers to a male person, so it is grammatically masculine. That is why the possessive adjective is:

• mój kolega = my male friend / my colleague

Compare:

• moja koleżanka = my female friend / female colleague
• moje dziecko = my child (neuter)

So the form of mój depends on the grammatical gender of the noun, not just the final letter.

Is kolega really masculine even though it ends in -a?