þéttnetuðum
þéttnetuðum is an Icelandic word. It is the dative plural of the adjective þéttnettað. This adjective is formed from the noun þéttnet, which translates to "dense network" or "tight mesh." Therefore, þéttnetuðum describes something that is in a dense or tight network, or has a tight mesh.
In practical usage, þéttnetuðum would typically modify a plural noun. For instance, one might refer to "þéttnetuðum