Collocations for undertaking - noun

big, considerable (esp. BrE), large, major
enormous, great, huge, massive, monumental, tremendous (esp. AmE)
ambitious, important, serious
worthwhile
hazardous, risky
complex, difficult
costly, expensive
joint
the first joint undertaking of the two societies

commercial
We have to decide if this is a worthwhile commercial undertaking.

solemn
express
irrevocable
voluntary
written
contractual
public

give (sb), make
He gave an undertaking not to leave the country before the trial.

seek
obtain
honour/honor
The factory failed to honour/honor its undertaking to stop dumping waste into the local river.

sign