onbutan, abutan [OE]
aboute [MI]
about [ME]
abaot
https://www.etymonline.com/word/about#etymonline_v_63
https://www.merriam-webster.com/dictionary/about#dictionary-entry-2
https://quod.lib.umich.edu/m/middle-english-dictionary/dictionary/MED160
https://bosworthtoller.com/37398
https://bosworthtoller.com/24479