固定

to fix / to fasten / to set rigidly in place / fixed / set / regular

hard / strong / solid / sure / assuredly / undoubtedly / of course / indeed / admittedly

to set / to fix / to determine / to decide / to order

fixed assets

set phrase

landline telephone / fixed-line telephone

fixed point / calibration point

fixed mindset (as opposed to growth mindset)

fixed income