This is the 475th most frequent Icelandic word.
fjölgaði
"Increased" or "multiplied."
The word "fjölgaði" is used as a verb to mean 'increased', indicating a numerical or quantitative growth.
Fjöldi íbúa fjölgaði í bænum á síðasta ári.
The number of residents in the town increased last year.
Here, "fjölgaði" implies an addition or increment in count, referring to the appearance of more trees.
Tré fjölgaði á sviðinu í myndlistarsýningunni.
The trees increased on the stage in the art exhibition.
In this context, "fjölgaði" serves as a verb meaning 'grew in number', relating to participants.