say it: in-DET-id-nis
indebtedness is a noun meaning "an obligation to pay money to another party". It carries 2 recorded senses.
an obligation to pay money to another party
a personal relation in which one is indebted for a service or favor
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for indebtedness come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.