Unnecessary Legalese, Mostly Archaic
Commence
This word is unavoidable as a technical term in litigation: one commences an action under the Courts of Justice Act, RSO 1990, c C43, for example.
But don’t use the word in normal parlance or non-technical writing, where it sounds fussy and pompous.
She didn’t commence employment on whatever date; she started work.
While we’re on the subject, the academic term commencement for a graduation ceremony (so, the conclusion rather than beginning of one’s course of study) has always seemed strange to me – perhaps because it’s a Cambridge term, and more recently an American one. But …