Definition of immarcescible in English:

immarcescible

Pronunciation /ɪməˈsɛsɪbl/ /ˌɪmɑːˈsɛsɪbl/

adjective

rare, literary, poetic
  • Unfading; incorruptible, imperishable.

    In earlier use frequently in "immarcescible crown of glory".

Origin

Late 15th century; earliest use found in Higden's Polychronicon. From post-classical Latin immarcescibilis (also immarcessibilis, immarciscibilis) unfading, imperishable (Vetus Latina, Vulgate) from im- + marcescibilis, after Hellenistic Greek ἀμάραντος, ἀμαράντινος.