Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
defeasible is an adjective meaning "capable of being annulled or voided or terminated". It carries one recorded sense.
capable of being annulled or voided or terminated
“a claim to an estate may be defeasible so long as the claimant is under 21 and unmarried”
Definitions, synonyms and semantic relations for defeasible come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. .