"Dw i'n gwrando arni hi."
Translation:I'm listening to her.
It does. It is also used to create other meanings with some verb-nouns. Here:
- Gwrando - listening, to listen
- Gwrando ar - listening to, to listen to
- Edrych - looking, to look
- Edrych ar - looking at, to look at
- Gweiddi ar - shouting at
- Syllu ar - to stare at
- Cymryd - taking
- Cymryd ar - pretending
Many verb-nouns combine with a various prepositions to extend or modify their meanings. A dictionary such as www.gweiadur.com will often give examples of these. Look up mynd and dod, for example.