undertake
For the verb: "to undertake"
| Simple Past: | undertook |
| Past Participle: | undertaken |
Concise Oxford English Dictionary © 2008 Oxford University Press:
undertake/ʌndəˈteɪk/
▶verb (past undertook; past part. undertaken)
- 1 commit oneself to and begin (an enterprise or responsibility); take on.
- 2 formally guarantee, pledge, or promise.
'undertake' also found in these Oxford entries:

