потъвам означава в английски

sink [sank, sunk, sinking, sinks]▼(descend into liquid, etc)
verb
[UK: sɪŋk] [US: ˈsɪŋk]

submerge [submerged, submerging, submerges]▼(to engulf or overwhelm (used in the passive))
verb
[UK: səb.ˈmɜːdʒ] [US: səb.ˈmɝːdʒ]