The first letter of the Polish alphabet, written in the Latin script.

Abbreviation of ar.

and, but, whereas (used contrastively)
and (used to continue a previous statement or to add to it)
and then (used to say an event will occur if some requirement is fulfilled)
and (used after a verb to indicate it will last a long time)
such and such (used when the speaker does not want to be more specific, when repeating an element)
is (used to show some connection between two objects which are very different from each other)
what about

ah! (used when the speaker has remembered or noticed something)