D defs.my
Entry 1 sense Webster, 1913

Incessant

/ĭnˌ-sĕs'-ənt/ · In·ces·sant · IPA /ɪnˈsɛs.ənt/
01 a. Continuing or following without interruption; unceasing; unitermitted; uninterrupted; continual; as, incessant clamors; incessant pain, etc.
  1. 1.
    Continuing or following without interruption; unceasing; unitermitted; uninterrupted; continual; as, incessant clamors; incessant pain, etc.
    “Against the castle gate, . . . Which with incessant force and endless hate, They batter'd day and night and entrance did await.” Spenser.