To take in hand; attempt; try.
To covenant; engage.
To make oneself responsible for anything.
To enter into a contract.
" I shouldn't undertake to say, sir," was his answer. – Walking-Stick Papers by Robert Cortes Holliday
It's a big thing for one man to undertake. – Prescott of Saskatchewan by Harold Bindloss
What a charge to make me undertake! РAbb̩ Aubain and Mosaics by Prosper M̩rim̩e