immersed

adjective3

1. •
   Under the surface of a liquid; sunk.
2. •
   Lowered or sunken relative to a reference surface.

   • Sori in the axils of lamina branches, partly immersed; involucre bell- or trumpet-shaped, or obconical, usually 2-lipped; receptacle generally exserted.
3. •
   (figurative) Deeply involved.