submersible

Adjective

• capable of being immersed in water or functioning while submerged
  • a submersible pump
    
  • a submergible electric frying pan
    

Noun

• a warship designed to operate under water

• an apparatus intended for use under water

Related words

• Synonyms: 
  submergible , submersible warship
• Antonyms: 
  nonsubmersible , nonsubmergible , surface ship