This is the 947th most frequent Icelandic word.
vildu
"Vildu" means "wanted" or "would you like" depending on context.
Here, 'vildu' is used as the past form of 'vilja' to indicate that the children had a desire or intent at that specific moment in the past.
Krakkarnir vildu fara út í garðinn að leika.
The children wanted to go out into the garden to play.
In this context, 'vildu' conveys a polite query about the willingness or interest of others to engage in a given activity, framed in an indirect speech format.
Ég spurði hvort þau vildu hjálpa til við verkefnið.
I asked if they would like to help with the project.
In this sentence, 'vildu' is a polite request, functioning as the second-person plural or formal singular past simple form of 'vilja', expressing an invitation or suggestion.