#1 undertake v. [set about, attempt] enter upon an activity or enterprise. wn
#2 undertake v. [tackle, take on] accept as a challenge; "I'll tackle this difficult task". wn
#3 undertake v. [guarantee] promise to do or accomplish; "guarantee to free the prisoners". wn
#4 undertake v. [contract] enter into a contractual arrangement. wn
#5 undertake v. [take in charge] accept as a charge. wn
vizzz