From Wiktionary, the free dictionary
רָדוּד • (radúd) (feminine רְדוּדָה, masculine plural רְדוּדִים, feminine plural רְדוּדוֹת)
- Shallow: not deep; having little depth.
- קפץ למים רדודים ― kafáts l'máyim r'dudím ― jumped into shallow water
- Used figuratively; shallow, superficial.