immersed(under the surface) adjective [UK: ɪ.ˈmɜːst] [US: ˌɪ.ˈmɝːst]He is totally immersed in family life and has no wish to work. = Está totalmente sumergido en su vida familiar y no tiene deseos de trabajar.
underwater(beneath the water surface) adjective [UK: ˈʌn.də.wɔː.tə(r)] [US: ˈʌn.dəˌr.wɒ.tər]