An alteration of eschewen after the prefix en-. IPA(key): /ɛnˈt͡ʃiu̯ən/ enchewen (third-person singular simple present encheweth, present participle enchewende...
Frankish *skiuhijan; a doublet of skewen (“to run diagonally”). Compare enchewen and, more distantly, schey. IPA(key): /ɛ(s)ˈt͡ʃiu̯ən/, /ɛˈʃiu̯ən/ (possibly)...