tie up; bind
She swore she would never marry and allow a husband to fetter her free and independent spirit.
fetter = feet tier i.e. used to tie feet. when divided fett+er. fett sounds like FEET. SO your feets are tied with something like a chain. and thus you restrained to go somewhere. but basically (this word is derived from Middle English word feter, from Old English; akin to Old Eng fetter soundslike (shutter) when a shutter is closed. then nothin can go out of it