Stiff

жёсткий

žóstkij

(of an object, rigid, hard to bend, inflexible)

жёсткий

žóstkij

(figuratively: of policies and rules and their application and enforcement)

кре́пкий

krépkij

(potent)

неги́бкий

negíbkij

(of an object, rigid, hard to bend, inflexible)

непоколеби́мый

nepokolebímyj

(figuratively: of policies and rules and their application and enforcement)

непрекло́нный

nepreklónnyj

(figuratively: of policies and rules and their application and enforcement)

одеревене́лый

oderevenélyj

(of muscles, or parts of the body)

окостене́вший

okostenévšij

(of muscles, or parts of the body)

сильноде́йствующий

silʹnodéjstvujuščij

(potent)

стро́гий

strógij

(colloquial: harsh, severe)

суро́вый

suróvyj

(colloquial: harsh, severe)

твёрдый

tvjórdyj

(of an object, rigid, hard to bend, inflexible)

твёрдый

tvjórdyj

(figuratively: of policies and rules and their application and enforcement)

холо́дный

xolódnyj

(of a person, formal in behavior, unrelaxed)

чо́порный

čópornyj

(of a person, formal in behavior, unrelaxed)

жму́рик

žmúrik

(slang: cadaver, dead person)

лох

lox

(person who is deceived)

труп

trup

(slang: cadaver, dead person)