Definition of obsecration in English:

obsecration

noun

rare
  • [mass noun] Earnest pleading or supplication.

    • ‘Well, perhaps not, for it can better be read as the futile obsecration of one pro-Roman faction, losing out to their retro-Celtic foes.’
    • ‘‘Ladies and gentlemen of the jury,’ he began in obsecration.’
    • ‘An obsecration was, and is, part of all ancient and modern oaths.’
    plea, appeal, request, petition, cry from the heart
    View synonyms

Origin

Late Middle English: from Latin obsecratio(n-), from obsecrare entreat, based on sacer, sacr- sacred.

Pronunciation

obsecration

/ˌɒbsɪˈkreɪʃ(ə)n/