engineers is a form of:

Perambulate



ENGLISH MEANING
verb
1.
(TRANSITIVE) To walk through or over; especially, to travel over for the purpose of surveying or examining; to inspect by traversing; specifically, to inspect officially the boundaries of, as of a town or parish, by walking over the whole line.
2.
(INTRANSITIVE) To walk about; to ramble; to stroll; as, he perambulated in the park.