submerged in (?.)

• absorbed
• absorbed in
• buried in
• caught up in
• contemplating
• contemplative
• devoted
• devoted to
• engaged
• engrossed
• engrossed in
• enmeshed in
• entangled in
• far-gone
• immersed in
• implicated in
• intent
• intent on
• involved
• involved in
• lost in
• meditating
• meditative
• monomaniacal
• monopolized
• obsessed
• occupied
• preoccupied
• single-minded
• studious
• studying
• swept up
• taken up with
• tied up in
• totally absorbed
• wrapped in
• wrapped up in