This is the 8447th most frequent Russian word.
науседа
The word "науседа" does not exist in Russian or may be a misspelling.
Here "науседал" is used to describe a firm or settled sitting position.
Он науседал на старую скамейку в парке.
He was sitting firmly on the old bench in the park.
Here "науседал" shows the action of the dog positioning itself steadily and ready for actions.
Пёс науседал рядом с хозяином, ожидая команды.
The dog settled down next to its owner, awaiting a command.
In this context, "науседала" implies sitting in a relaxing and deliberate manner.