date back vs ascend

date back and ascend both are verbs.

Word	Noun	Adjective	Verb	Adverb
date back	No	No	Yes	No
ascend	No	No	Yes	No

As verbs, ascend is a hyponym of date back; that is, ascend is a word with a more specific, narrower meaning than date back:

date back (verb)	ascend (verb)
belong to an earlier time	slope upwards
	travel up
	come up, of celestial bodies
	go along towards (a river's) source
	move to a better position in life or to a better job
	appear to be moving upward, as by means of tendrils
	become king or queen
	go back in order of genealogical succession