An example of incessant is the chirping of birds that lasts all morning.
Origin of incessantEarly Modern English ; from Late Latin incessans ; from Classical Latin in-, not + cessans, present participle of cessare, to cease
Origin of incessantMiddle English incessaunte, from Late Latin incessāns, incessant- : Latin in-, not; see in–1 + Latin cessāns, present participle of cessāre, to stop; see cease.
(comparative more incessant, superlative most incessant)
From Old French incessant