verb (v)

• pledge without delivery or title of possession(verb.communication)

  source: wordnet30
• to believe especially on uncertain or tentative grounds(verb.cognition)

  Synonym:
  conjecture, hypothesise, hypothesize, speculate, suppose, theorise, theorize
  

  source: wordnet30
• To subject, as property, to liability for a debt or engagement without delivery of possession or transfer of title; to pledge without delivery of possession; to mortgage, as ships, or other personal property; to make a contract by bottomry. See Hypothecation, Bottomry.(verb)

  source: webster1913