This is the 12946th most frequent Swedish word.
svämmats
"Swämmats" means "to be flooded" or "overflowed" in English.
In this case, 'svämmats över' refers to the literal overflowing of the river due to excess water.
Floden har svämmats över efter mycket regn.
The river has overflowed after heavy rain.
The phrase 'svämmats över' here metaphorically describes the abundance of emotions overtaking the discussion.
Diskussionen har svämmats över av känslor och tagit en personlig vändning.
The discussion has been flooded with emotions and has taken a personal turn.
Here, 'svämmats över' means 'to be overwhelmed or flooded with,' which is used figuratively for an excess of presence or quantity.