shackle

a ring or other fastening, as of iron, for securing the wrist, ankle, etc.; fetter.

a hobble or fetter for a horse or other animal.

the U -shaped bar of a padlock, one end of which is pivoted or sliding, the other end of which can be released, as for passing through a staple, and then fastened, as for securing a hasp.

any of various fastening or coupling devices.

Often shackles. anything that serves to prevent freedom of procedure, thought, etc.

to put a shackle or shackles on; confine or restrain by a shackle or shackles.

to fasten or couple with a shackle.

to restrain in action, thought, etc., as by restrictions; restrict the freedom of.