Noah Webster's Dictionary (adv.) Unceasingly; continually.

Multi-Version Concordance Incessantly (2 Occurrences) Acts 6:13 Here they brought forward false witnesses who declared, "This fellow is incessantly speaking against the Holy Place and the Law. (WEY NAS) Acts 26:7 to which our whole twelve tribes serving incessantly day and night hope to arrive; about which hope, O king, I am accused of the Jews. (DBY)