Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

WORD ORIGIN

1580s, from cease (n.) + -less. Related: Ceaselessly; ceaselessness.

MORE RELATED WORDS FOR CEASELESSNESS

endlessness

nouneverlastingness
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.