Come si dice fermo in inglese?

intenzione [a]: unfaltering [formal]; firm
posizione [a]: steady; fixed; firm; stable
movimento [a]: motionless
oggetti [a]: immovable; immobile
sentimento [a]: unfaltering
persona [a]: unswerving
comportamento [a]: inflexible; adamant [formal]; unyielding; unbending; hard as nails [informal]; tough as nails [informal]; determined; resolute; decisive; firm; stout