What is the meaning of constant '?
noun. Definition of constant (Entry 2 of 2) : something invariable or unchanging: such as. a : a number that has a fixed value in a given situation or universally or that is characteristic of some substance or instrument. b : a number that is assumed not to change value in a given mathematical discussion.
What is the nearest in meaning of incessant?
In Latin, cessare means "to stop," so when you add the negative prefix in-, you get a word meaning "never stopping." A near synonym is continual, but something incessant is more relentless; ceaseless is a closer synonym.