1.  hypothecate(v = verb.communication) - pledge without delivery or title of possession;
Sample sentences: Somebody ----s something

2.  hypothecate(v = verb.cognition) conjecture, hypothesise, hypothesize, speculate, suppose, theorise, theorize - to believe especially on uncertain or tentative grounds; "Scientists supposed that large dinosaurs lived in swamps"
Derived form noun hypothesis₂, noun hypothesis₃
Sample sentences: They %s that there was a traffic accident

   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. [1913 Webster]

hypothecate, v.tr. pledge, mortgage.

Derivative:
hypothecation n.

Etymology:
med.L hypothecare (as HYPOTHEC)

VB  give security, give bail, give substantial bail, go bail, pawn, impawn, spout, mortgage, hypothecate, impignorate, guarantee, warrant, warrantee, assure, accept, indorse, underwrite, insure, cosign, countersign, sponsor, cosponsor, execute, stamp, sign, seal, let, sett, grant a lease, take a lease, hold a lease, hold in pledge, lend on security.