undertake vs qualify

undertake and qualify both are verbs.

Word	Noun	Adjective	Verb	Adverb
undertake	No	No	Yes	No
qualify	No	No	Yes	No

As verbs, qualify is a hyponym of undertake; that is, qualify is a word with a more specific, narrower meaning than undertake:

undertake: enter into a contractual arrangement
qualify: specify as a condition or requirement in a contract or agreement; make an express demand or provision in an agreement

Other hyponyms of undertake include stipulate, sign, condition, specify, stipulate, lease, rent, charter, hire, lease, rent.

undertake (verb)	qualify (verb)
promise to do or accomplish	make fit or prepared
enter into a contractual arrangement	add a modifier to a constituent
enter upon an activity or enterprise	make more specific
accept as a charge	specify as a condition or requirement in a contract or agreement; make an express demand or provision in an agreement
accept as a challenge	describe or portray the character or the qualities or peculiarities of
	pronounce fit or able
	prove capable or fit; meet requirements