chaperone

noun

1. An older person who accompanies other younger people to ensure the propriety of their behaviour, often an older woman accompanying a young woman.
2. A protein that assists the non-covalent folding/unfolding and the assembly/disassembly of other macromolecular structures, but does not occur in these structures when the latter are performing their normal biological functions.
3. (UK)An employee sent by a British company to the European Union to work with a client there, to circumvent restrictions imposed after Brexit.

verb

1. To act as a chaperone.

   “They played you off very cunning, Eliza. If it had been only one of them, you could have nailed him. But you see, there was two; and one of them chaperoned the other, as you might say.”

   “'Purcell had volunteered to chaperone a delegation of female students'”

   “TfL has more than enough to be getting on with each day without having to chaperone TV crews.”

2. (UK)To work as a chaperone.