Question

Undertake

Accepted Answer

to do or begin to do something, especially something that will take a long time or be difficult (formal). To promise that you will do something (formal).Todd and Louis were penguins who undertook a long, dangerous trip from Antarctica to Thailand.He undertook to raise his sister's child.The most creative act you will ever undertake is the act of creating yourself.

Front	Undertake
Back	to do or begin to do something, especially something that will take a long time or be difficult (formal). To promise that you will do something (formal). Todd and Louis were penguins who undertook a long, dangerous trip from Antarctica to Thailand. He undertook to raise his sister's child. The most creative act you will ever undertake is the act of creating yourself.

Undertake Formal Undertook Act Begin Long Time Difficult